第九届中国LHC物理年会 The 9th China LHC Physics Workshop (CLHCP2023)
Shanghai
尊敬的各位专家学者及各位同学好：
2023年第九届中国LHC物理年会 The 9th China LHC Physics Workshop (CLHCP2023)由中国物理学会高能物理分会主办，上海交通大学李政道研究所/物理与天文学院承办，中国高等科学技术中心（CCAST）与北京大学高能物理中心（PKUCHEP）协办，会议日期为2023年11月16日至11月20日 (11月15日报到 )。
中国LHC物理年会（简称CLHCP）是由中国物理学会高能物理分会指导、各地学术机构轮流主办的全国性重要学术会议，聚焦于高能量与高精度前沿粒子物理实验与理论的最新研究进展，会议内容包括：上帝粒子希格斯物理、电弱物理、强子物理与味物理、重离子物理、超越标准模型的新物理、探测器与加速器技术等粒子物理高能量与高精度前沿重要基础研究热点方向。会议旨在加强理论物理学家及实验物理学家在高能量前沿、高精度前沿与实验技术前沿领域的交流与合作，引领粒子物理领域国内研究水平的共同进步、推动国内相关研究工作的国际学术影响力、为年轻学者提供交流与合作的舞台。
会议组委会特邀请您参加本次研讨会 !
会议注册：
会议收取注册费：2000元（教师、博士后），1500元（学生），食宿由会务组统一安排，费用自理。
推荐采用indico在线缴纳注册费以便较快开具注册费发票（线下缴费开具发票会比较慢）。注册后点击checkout在线缴费即可。
会议全程直播链接：https://m.koushare.com/topicLive/i/CLHCP2023
会议报告：(Email: CLHCP2023-PC@cern.ch)
大会报告由Program Committee单独邀请
分会理论报告请在indico网站直接提交（10.15日前）并遴选：https://indico-tdli.sjtu.edu.cn/event/1616/abstracts
分会实验报告请联系各实验合作组对应的Program Committee成员：https://indico-tdli.sjtu.edu.cn/event/1616/page/86-organization-committee
关于注册、缴费、住宿、报到、报销等，如有不明之处，请联系：
会务秘书邮箱：CLHCP2023-Secretariat@cern.ch
会议报告事宜（如报告改期，取消，线上报告等）请联络组委会：
会务团队：
贺刚、求芳英（上海交通大学物理天文学院粒子与核物理研究所）
汪雯、丁梦安（上海交通大学李政道研究所粒子与核物理研究部）
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Registration 3h 30m
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Reception Dinner Function Room 10 光大10号厅 (2nd Floor 二楼)
Function Room 10 光大10号厅
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Plenary Session: (In Chinese) Ballroom 宴会厅 (2nd Floor 光大二楼)
Ballroom 宴会厅
2nd Floor 光大二楼
光大国际大酒店二楼宴会厅 (2nd Floor, Ballroom)Convener: Prof. Xiaogang He (TDLI, SJTU)-
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Speech from SJTU-TDLI and CPS 5mSpeaker: Prof. Jie Zhang (TDLI, SJTU)
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Speech from Funding Agency 5mSpeaker: Prof. Huihong Li (NSFC)
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Speech from CPS High Energy Branch 5mSpeaker: Prof. Zhengguo Zhao (USTC)
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Announcements from LOC 5mSpeakers: Shu Li (TDLI, SJTU), Haijun Yang (SJTU/TDLI)
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Coffee Break Catering Area茶歇区 (2nd Floor 光大二楼)
Catering Area茶歇区
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Plenary Session Ballroom 宴会厅 (2nd Floor 光大二楼)
Ballroom 宴会厅
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Convener: Yusheng Wu (USTC)- 11:00
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Precision Higgs measurements at the LHC 25mSpeaker: Prof. Xiaohu SUN (Peking University)
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Lunch Function Room 6, 7, 11 光大6、7、11号厅 (2nd Floor 光大二楼)
Function Room 6, 7, 11 光大6、7、11号厅
2nd Floor 光大二楼
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HF/HI/QCD: Heavy Flavor (1) Function Room 8 光大8号厅 (2nd Floor 光大二楼)
Function Room 8 光大8号厅
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Convener: Prof. Liang Sun (Wuhan University)- 14:00
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Interference fit to the double Jpsi mass spectrum at CMS 15mSpeaker: Xining Wang (Tsinghua University)
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Instrumental: Timing Detector (1) Function Room 1 光大1号厅 (2nd Floor 光大二楼)
Function Room 1 光大1号厅
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Convener: Prof. Xiaohu SUN (Peking University)-
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Status of USTC-IME Pre-production sensor for the ATLAS High Granularity Timing Detector 15mSpeaker: Kuo Ma (University of Science and Technology of China)
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First results of USTC AC-coupled LGADs 15mSpeaker: han li
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Electronics test results of Altiroc2 and Altiroc3 15mSpeaker: zhuang li
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HGTD module assembly and module test at USTC 15mSpeaker: Aonan Wang (USTC)
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ATLAS High granularity timing detector activity at IHEP/NJU 15mSpeaker: zhijun Liang (IHEP)
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IHEP-IME radiation hard LGAD sensor pre-production for ATLAS High granularity timing detector 15mSpeaker: 梅 赵 (IHEP)
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The Prototype Design of PEB - a Component of the HGTD In-detector Electronics for the ATLAS Phase-II Upgrade 15mSpeaker: Zhenwu Ge (Nanjing University)
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R&D of AC-LGAD based 4D tracker with precision timing information for HL-LHC and the future colliders 15mSpeaker: Weiyi Sun
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TeV: Higgs (1) Function Room 10 光大10号厅 (2nd Floor 光大二楼)
Function Room 10 光大10号厅
2nd Floor 光大二楼
Convener: Prof. Lei Zhang (Nanjing University (CN))-
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Constraint for a light charged Higgs boson and its neutral partners from top quark pairs at the LHC 20m
The charged Higgs boson plays an essential role in distinguishing between a wide variety of standard model extensions with multiple Higgs doublets. We study the prospect of a light charged Higgs boson, produced by top quark pairs at the Large Hadron Collider (LHC), and decaying into a $W$ boson and a pair of bottom quarks via an intermediate neutral Higgs boson ($H_i$). We reinterpret the cross sections of $WWbb\bar{b}\bar{b}$ final states measured by the ATLAS collaboration at LHC 13 TeV in the presence of the aforementioned decay, in a relatively wide range of Higgs masses. We find improved agreements with the data and obtain limits on the total branching ratio of the decay chain. The limits impose the strongest constraints on the parameter space of type-I two-Higgs-doublet model for most Higgs masses sampled when $H_i$ is the $CP$-odd Higgs boson $A$. We also calculate potential constraints with pseudodata in high-luminosity runs of the LHC.
Speaker: 淳浩 傅 -
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Partial NLO electroweak corrections to Higgs pair production in gluon fusion 20m
We calculated partial SM NLO electroweak corrections to Higgs pair production in gluon fusion, which are proportional to triple Higgs self-interacting constant. Then we did the same calculations with the Standard Model Effective Field Theory (SMEFT) dimension-6 Higgs self-interacting operators, and calculated the cross sections corresponding to different SMEFT parameters.
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Early Run3 H→γγ fiducial Cross-Section measurement 15mSpeaker: Peng Zhang (IHEP)
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Test of CP Invariance in Higgs Boson Vector-Boson-Fusion Production Using the H->gamgam Channel with the ATLAS Detector 15mSpeaker: Fangyi Guo (IHEP)
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Novel photon energy calibration method and Higgs mass measurement 15mSpeaker: Mingxu He (IHEP)
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(Remote) Measurement of the H->ZZ->4l cross-sections in pp collisions at 13.6 TeV with the ATLAS detector 15mSpeaker: Chunhao Tian (USTC)
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Measurements of inclusive and differential cross sections for the Higgs boson production and decay to four-leptons in proton-proton collisions at √s = 13 TeV 15mSpeaker: Qianying GUO (BUAA)
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Theory: QCD (1) Function Room 9 光大9号厅 (2nd Floor 光大二楼)
Function Room 9 光大9号厅
2nd Floor 光大二楼
Convener: Haitao Li (haitao.li@sdu.edu.cn)-
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Factorization of Non-Global LHC Observables and Resummation of Super-Leading Logarithms 20m
We present a systematic formalism based on a factorization theorem in soft-collinear effective theory to describe non-global observables at hadron colliders, such as gap-between-jets cross sections. The cross sections are factorized into convolutions of hard functions, capturing the dependence on the partonic center-of-mass energy, and low-energy matrix elements, which are sensitive to the low scale characteristic of the veto imposed on energetic emissions into the gap between the jets. The scale evolution of both objects is governed by a renormalization-group equation, which we derive at one-loop order. By solving the evolution equation for the hard functions for arbitrary 2→M jet processes in the leading logarithmic approximation, we accomplish for the first time the all-order resummation of the so-called "super-leading logarithms" discovered in 2006, thereby solving an old problem of quantum field theory. We study the numerical size of the corresponding effects for different partonic scattering processes and explain why they are sizable for pp→2jets processes, but suppressed in H/Z+jet production. The super-leading logarithms are given by an alternating series, whose individual terms can be much larger than the resummed result, even in very high orders of the loop expansion. Resummation is therefore essential to control these effects. We find that the asymptotic fall-off of the resummed series is much weaker than for standard Sudakov form factors.
Speaker: Dingyu Shao (Fudan University) -
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Production and Decay of Top Quarks at Lepton Colliders at N3LO in QCD 20m
In this talk we will discuss the recent processes in the calculation of the high-order perturbative corrections to the semi-inclusive production and decay of top quarks at lepton colliders at N3LO in QCD. In particular, the talk will be focusing on the first high-precision calculation of the complete QCD corrections to the top-quark decay width $\Gamma_t$, $W$-helicity fractions and semi-inclusive distributions to the third order in the strong coupling constant $\alpha_s$. We find, in particular, that the pure $\mathcal{O}(\alpha_s^3)$ correction decreases $\Gamma_t$ by $0.8\%$ of the previous $\mathcal{O}(\alpha_s^2)$ result, exceeding considerably the error estimated by the usual scale-variation prescription. With this critical piece of correction included, we arrive at the to-date most precise theoretical prediction which meets the envisaged precision request by future hadron and lepton colliders.
Speaker: Dr Long Chen (Shandong University) -
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$\Xi_c-\Xi_c^{\prime}$ mixing From Lattice QCD 20m
In heavy quark limit, the lowest-lying charmed baryons with two light quarks can form an SU(3) triplet and sextet. The $\Xi_c$ in the SU(3) triplet and $\Xi_c'$ in the sextet have the same $J^{PC}$ quantum number and can mix due to the finite charm quark mass and the fact the strange quark is heavier than the up/down quark. We explore the $\Xi_c$-$\Xi_c'$ mixing by calculating the two-point correlation functions of the $\Xi_c$ and $\Xi_c'$ baryons from lattice QCD. Based on the lattice data, we adopt two independent methods to determine the mixing angle between $\Xi_c$ and $\Xi_c'$. After making the chiral and continuum extrapolation, it is found that the mixing angle $\theta$ is $1.2^{\circ}\pm0.1^{\circ}$, which seems insufficient to account for the large SU(3) symmetry breaking effects found in weak decays of charmed baryons.
Speaker: Hang Liu -
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Nonperturbative fitting in resummation calculation 20m
The resummation calculation (ResBos) is a widely used tool for the simulation of single vector boson production at colliders. As the improvement over the ResBos code by increasing the accuracy from NNLL+NLO to N$^3$LL+NNLO, the nonperturbative function needs to be updated. We propose a new non-perturbative function (IFY) that includes information about the rapidity of the system. The IFY functional form was fitted to data from fixed target experiments, the Tevatron, and the LHC. We find that the non-perturbative function has mild rapidity dependence based on the results of the fit.
Speaker: Yao Fu (University of Science and Technology of China) -
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Transverse-Momentum-Dependent Wave Functions of Pion from Lattice QCD 20m
We present a first lattice QCD calculation of the transverse-momentum-dependent wave functions (TMDWFs) of the pion using large-momentum effective theory. Numerical simulations are based on one ensemble with 2+1+1 flavors of highly improved staggered quarks action with lattice spacing a = 0.121 fm from the MILC Collaboration, and one with 2 +1 flavor clover fermions and tree-level Symanzik gauge action generated by the CLS Collaboration with a = 0.098 fm. As a key ingredient, the soft function is first obtained by incorporating the one-loop perturbative contributions and a proper normalization. Based on this and the equal-time quasi-TMDWFs simulated on the lattice, we extract the light-cone TMDWFs. The results are comparable between the two lattice ensembles and a comparison with phenomenological parametrization is made. Our studies provide a first attempt of ab initio calculation of TMDWFs which will eventually lead to crucial theory inputs for making predictions for exclusive processes under QCD factorization.
Speaker: Mr Minhuan Chu (Shanghai Jiao Tong University) -
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Automated calculation of Jet fragmentation at NLO in QCD 20m
We present
FMNLO, a framework to combine general-purpose Monte Carlo generators and fragmentation functions (FFs). It is based on a hybrid scheme of phase-space slicing method and local subtraction method, and accurate to next-to-leading order (NLO) in QCD. The new framework has been interfaced toMG5_aMC@NLOand made publicly available in this work. We demonstrate its unique ability by giving theoretical predictions of various fragmentation measurements at the LHC, followed by comparison with the data. With the help of interpolation techniques,FMNLOallows for fast calculation of fragmentation processes for a large number of different FFs, which makes it a promising tool for future fits of FFs. As an example, we perform a NLO fit of parton fragmentation functions to unidentified charged hadrons using measurements at the LHC. We find the ATLAS data from inclusive dijet production show a strong constraining power. Notable disparities are found between our gluon FF and that of BKK, DSS and NNFF, indicating the necessities of additional constraints and data for gluon fragmentation function.Speaker: 重阳 刘 (上海交通大学粒子物理与核物理研究所)
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Coffee Break Catering Area茶歇区 (2nd Floor 光大二楼)
Catering Area茶歇区
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HF/HI/QCD: Heavy Flavor (2) Function Room 8 光大8号厅 (2nd Floor 光大二楼)
Function Room 8 光大8号厅
2nd Floor 光大二楼
Convener: Shanzhen Chen (IHEP, CAS)-
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Psi(2S)/Jpsi versus multiplicity in pp 15mSpeaker: You'en Kang
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Omegac0 two-body hadronic decays at LHCb 15mSpeaker: Chuangxin Lin
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Instrumental: Timing Detector (2) Function Room 1 光大1号厅 (2nd Floor 光大二楼)
Function Room 1 光大1号厅
2nd Floor 光大二楼
Convener: zhijun Liang (IHEP)-
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Module performance study for the High Granularity Timing Detector of ATLAS 15mSpeaker: 轩 Xuan 杨 Yang (中国科学院高能物理研究所(IHEP,CAS))
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Radiation Tolerance of the MUX64 for the High Granularity Timing Detector of ATLAS 15mSpeaker: Chuanye Wang (Nanjing University)
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Automatic Module assembly development for ATLAS High granularity timing detector 15mSpeaker: Xinhui Huang
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HGTD PEB DC/DC Power Block in Low Temperature and Magnetic Field Operation 15mSpeaker: 明杰 翟
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Performance of USTC-IME sensors in test beams at DESY and CERN 15mSpeaker: Xiangxuan Zheng
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TeV: Higgs (2) Function Room 10 光大10号厅 (2nd Floor 光大二楼)
Function Room 10 光大10号厅
2nd Floor 光大二楼
Convener: Meng Xiao (Zhejiang university)-
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Higgs boson pair production and decay to $b \bar{b}\gamma \gamma$ at NLO in QCD 20m
We calculate the total cross-section and differential distributions of Higgs boson pair production and decay to $b \bar{b}\gamma \gamma$ at NLO in QCD.
Speaker: Dan Zhao (山东大学) -
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Legacy search for the non-resonant production of Higgs boson pairs via gluon fusion and vector-bosonfusion in the 𝑏𝑏𝜏𝜏 final state in proton-proton collisions at √s = 13 TeV with the ATLAS detector (remote) 15mSpeaker: Liangliang Han (Nanjing Univ.)
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Studies of new Higgs boson interactions through nonresonant HH production in the bbyy final state in pp collisions at √s = 13 TeV with the ATLAS detector 15mSpeaker: Ms Zihang Jia (Nanjing University)
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Preliminary Results on Higgs Pair Production in Multi-lepton Channel with the ATLAS Experiment 15mSpeaker: Yulei Zhang (SJTU)
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Search for diHiggs with VHH (Remote) 15mSpeaker: Licheng ZHANG (Peking University (CN))
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Higgs mass and width measurement in ZZ to 4-leptons final state with full Run2 data (CMS) 15mSpeaker: Chenguang Zhang (IHEP)
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Measurement of Higgs boson mass and width with LHC run2 data at the ATLAS experiment 15mSpeaker: Yangfan Zhang (University of Science and Technology of China)
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Theory: BSM (1) Function Room 9 光大9号厅 (2nd Floor 光大二楼)
Function Room 9 光大9号厅
2nd Floor 光大二楼
Convener: Prof. Bin Yan (IHEP)-
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Hunting for sterile neutrino at colliders 20m
We study the feasibility of observing sterile neutrino at the high energy colliders, using direct and indirect production channels in heavy meson/baryon and Higgs decays. It is found that these processes may set certain new constraints on the mass of sterile netrino in present running and next generation experiments.
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Theoretical Motivations for Hidden Light Bosons 20m
The physics beyond the Standard Model (BSM) could be represented by a hidden sector at relatively low energy scales MeV-GeV and feeble couplings to SM. Their presence in our Universe would be revealed through indirect evidences such as small oscillations of SM parameters, cosmological and astrophysical considerations, and the complementary searches in accelerators. Here, I give an overview of these BSM models including axions and hidden photons.
Speaker: Prof. Luca Visinelli (Shanghai Jiao Tong University) -
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Heavy long-lived coannihilation partner from inelastic Dark Matter model and its signatures at the LHC 20mSpeaker: Yuxuan He (Peking University)
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Unveiling time-varying signals of ultralight bosonic dark matter at collider and beam dump experiments 20mSpeaker: Jinhui Guo (Peking University)
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Dark matter distribution, structure formation and the potential to distinguish thermal histories of dark matter. 20m
It is important to understand the implications of current observational constraints and potential signatures on the thermal history of dark matter. Using the freeze-in/-out scenarios as templates, we revisit dark-matter production by solving the Boltzmann equations at the level of the phase-space distribution. We also investigate the current Lyman-alpha constraints on mass of the dark matter and build the connection between the mass and the production mechanism of dark matter and find that the current observation on structure formation can be imposed to constrain the decoupling temperatures and the phase-space distribution of dark matter. We further explore the potential of distinguishing different possible thermal histories of dark matter with hypothetical future observational data. This method can be more generally applied to other scenarios.
Speaker: Yuan-Zhen Li -
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Massive gauge theory with quasigluon for hot SU( N ) : Phase transition and thermodynamics 20mSpeaker: Jiang Zhu (TDLI)
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Dinner Function Room 6, 7, 11 光大6、7、11号厅 (2nd Floor 二楼)
Function Room 6, 7, 11 光大6、7、11号厅
2nd Floor 二楼
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Plenary Session Ballroom 宴会厅 (2nd Floor 光大二楼)
Ballroom 宴会厅
2nd Floor 光大二楼
Convener: Haijun Yang (Shanghai Jiao Tong University (CN))-
08:30
Theory overview: QCD 30m
Precision prediction for top quark physics
Top quark is the heaviest particle in the standard model. Once produced, the top quark immediately decays to a W boson and a bottom quark before hadronization. Precision studies for top quark physic plays essential role in the validity of the Standard Model and exploring potential avenues for new physics. In this talk I will review recently theoretical development in top quark physics, which includes the theoretical efforts for top quark production and decay.
Speaker: Haitao Li (haitao.li@sdu.edu.cn) -
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SM measurements at the LHC (+Top) 25mSpeaker: Chen Zhou (Peking University)
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Coffee Break Catering Area茶歇区 (2nd Floor 光大二楼)
Catering Area茶歇区
2nd Floor 光大二楼
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Plenary Session: Upgrade Ballroom宴会厅 (2nd Floor 光大二楼)
Ballroom宴会厅
2nd Floor 光大二楼
Convener: Huaqiao Zhang (IHEP)- 10:40
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Lunch Function Room 6, 7, 11 光大6、7、11号厅 (2nd Floor 光大二楼)
Function Room 6, 7, 11 光大6、7、11号厅
2nd Floor 光大二楼
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会议集体照（Conference Group Photo） Gate 光大门口
Gate 光大门口
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HF/HI/QCD: Heavy Ion (1) Function Room 8 光大8号厅 (2nd Floor 光大二楼)
Function Room 8 光大8号厅
2nd Floor 光大二楼
Convener: Zebo Tang (University of Science and Technology of China (USTC))-
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Non-prompt Λc+ production with machine learning in p–Pb collisions at √sNN = 5.02 TeV with ALICE 15mSpeaker: Pengzhong Lu
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Study of heavy-flavor physics via semi-muonic decays with ALICE 15mSpeaker: Maolin Zhang
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ALICE实验轻核动量关联研究 (Remote) 15mSpeaker: Dongfang Wang (Fudan Univ. (CN))
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Measurement of Ωc branching-fraction ratio at ALICE 15mSpeaker: Tiantian Cheng (CCNU)
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Pinning down the origin of collectivity in small systems with ALICE(Remote) 15mSpeaker: Mingrui Zhao
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Instrumental: Calorimeter Function Room 1 光大1号厅 (2nd Floor 光大二楼)
Function Room 1 光大1号厅
2nd Floor 光大二楼
Convener: 勇杰 孙 (中国科学技术大学)- 14:00
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HGCal SQC at IHEP and domestric silicon sensor R&D for calorimeter 15mSpeaker: xiao zhao
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ECAL simulation for LHCb Upgrade II 15mSpeaker: Jiale Fei (Wuhan University)
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Testbeam results of the LHCb Upgrade II ECAL prototype 15mSpeaker: Ge Ma
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Performance of the GAGG crystal for LHCb Upgrade II ECAL 15mSpeaker: Zhiyang Yuan (PKU)
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TeV: Higgs (3) Function Room 10 光大10号厅 (2nd Floor 光大二楼)
Function Room 10 光大10号厅
2nd Floor 光大二楼
Convener: Yanping Huang (IHEP)-
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Search for the exotic decay of the Higgs boson into a Z boson and a light pseudo-scalar decaying into two photons in pp collisions at 13TeV (CMS) 15mSpeaker: Zebing Wang (IHEP)
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Search for extra Higgs bosons through same-sign top-quark production in association with an extra jet(Remote) 15mSpeaker: Meng Lu (SYSU)
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Searches for lepton flavour violation in Higgs boson decays, H → eτ and H → μτ, at ATLAS 15mSpeaker: Antonio De Maria (Nanjing University (CN))
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Searches for Lepton-flavour-violating decays of the Higgs boson 15mSpeaker: Minlin Wu (SYSU)
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Search for a standard model-like Higgs boson in the mass range between 70 and 110 GeV GeV in the diphoton final state in proton-proton collisions at 13 TeV (CMS) 15mSpeaker: Junquan (军全) Tao (陶) (IHEP, CAS)
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Search for Higgs boson pair production in the bbμμ final state at the LHC (Remote) 20m
The Higgs boson pair production via gluon-gluon fusion and vector boson fusion in the bbμμ final state at the LHC is studied to probe the Higgs self-coupling κλ and the four-boson HHVV coupling κ2V for the first time. A cut-based analysis and a machine-learning analysis using boosted decision trees are performed with categorizations and optimizations depending on the variations of these couplings. The expected sensitivities are extracted with different integrated luminosities assumed up to the full highluminosity LHC runs. The expected upper limit at 95% confidence level on the Higgs boson pair production is calculated as 47 (28) times the Standard Model cross section using the cut-based method (boosted decision trees) for the gluon-gluon fusion production and 928 for the vector boson fusion production, assuming an integrated luminosity of 3000 fb^−1. The expected constraints on the couplings at 95% confidence level are calculated to be −13.8 < κλ < 19.1 (−10.0 < κλ < 15.5) and −3.4 < κ2V < 5.5 using the cut-based method (boosted decision trees), respectively, assuming an integrated luminosity of 3000 fb−1.
Speaker: Botao Guo (Peking University)
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Theory: BSM (2) Function Room 9 光大9号厅 (2nd Floor 光大二楼)
Function Room 9 光大9号厅
2nd Floor 光大二楼
Convener: Prof. Shao-Feng Ge (TDLI-SJTU)-
14:00
$B$ meson anomalies and large $B^{+}\to K^{+}\nu\bar{\nu}$ in non-universal $U(1)^\prime$ models 20m
In view of both the latest LHCb measurement of $R_{K^{(*)}}$ and the new $2.8\sigma$ deviation reported by Belle II on $B^{+}\to K^{+}\nu\bar{\nu}$ decays, we present a fit to the $B$ meson anomalies for various one and two dimensional hypothesis including complex Wilson coefficients. We show in a model-independent way that the generic non-universal $U(1)^{\prime}$ extensions of the SM, without flavour violation, fail to simultaneously fit those observables and corroborate that they can modify $\mathrm{BR}(B^{+}\to K^{+}\nu\bar{\nu})$ up to only a $10\%$. In view of this deficit, we propose a new way in which those models can accommodate the data at tree level by introducing lepton flavour violating couplings and non-diagonal elements of the charged lepton mixing matrix, with implications in future charged lepton flavour violation searches.
Speaker: CRISTIAN FELIPE SIERRA FONSECA (Nanjing Normal University) -
14:20
Probing Neutral Triple Gauge Couplings at the LHC, CEPC and SPPC 20m
We study probes of neutral triple gauge couplings (nTGCs) at the LHC, CEPC and SPPC. The nTGCs provide a unique window to the new physics beyond the Standard Model (SM) because they can arise from SM effective field theory (SMEFT) operators that respect the full electroweak gauge group $\mathrm{SU(2)}_{\mathrm L}^{}\!\otimes\mathrm{U(1)}_{\mathrm Y}^{}$ of the SM only at the level of dimension-8 or higher. We derive the neutral triple gauge vertices (nTGVs) generated by these dimension-8 operators in the broken phase and map them onto a newly generalized form factor formulation, which takes into account only the residual U(1)$_{\mathrm{em}}^{}$ gauge symmetry. Using this mapping, we derive new relations between the form factors that guarantee a truly consistent form factor formulation of the nTGVs and remove large unphysical energy-dependent terms. We then analyze the sensitivity reaches of the LHC, CEPC and SPPC for probing the nTGCs via both the dimension-8 nTGC operators and the corresponding nTGC form factors. We compare their sensitivities with the existing LHC measurements of nTGCs and with those of future colliders.
Speaker: Ruiqing Xiao -
14:40
Probing Inelastic Dark Matter at the LHC, FASER and STCF 20m
In this talk, we explore the potential of probing the inelastic dark matter (DM) model with an extra $U(1)_D$ gauge symmetry at the Large Hadron Collider, ForwArd Search ExpeRiment and Super Tau Charm Factory. To saturate the observed DM relic density, the mass splitting between two light dark states has to be small enough, and thus leads to some distinctive signatures at these colliders. By searching for the long-lived particle, the displaced muon-jets, the soft leptons, and the mono-photon events, we find that the inelastic DM mass in the range of $1$ MeV to $210$ GeV could be tested.
Speaker: Prof. Chih-Ting Lu (Nanjing Normal University) -
15:00
Dark photon effects with the kinetic and mass mixing in $Z\to \tau^-\tau^+$ 20m
A new $U(1)_X$ gauge boson field X can have renormalizable kinetic mixing with the standard model (SM) $U(1)_Y$ gauge boson field Y. Besides the dark photon kinetic mixing $\sigma$, there could be mass mixing by introducing the additional Higgs doublet with vev engaging in $U(1)_X$ and electroweak symmetry breaking simultaneously. The Z boson interaction with SM tau lepton is modified by defining the mixing ratio parameter $\epsilon$, which shows the magnitude of the mass and kinetic mixing of dark photon. We investigate the Z boson phenomenology of dark photon model with both the kinetic mixing and mass mixing. The allowed parameter region is obtained by analyzing these constraints from the vector and axial-vector couplings $g_{V,A}^\tau$, the decay branching ratio $Br(Z\to \tau^- \tau^+)$ and tau lepton polarization in $Z\to \tau^-\tau^+$. We found that the mixing ratio plays important role in the Z boson features by choosing different $\epsilon$ values.
Further, we attempt to find the common regions to satisfy these above four bounds for $m_X>m_Z$ and $m_XSpeaker: zhi-peng Xing (njnu) -
15:20
Aiming for Tops of ALPs with a Muon Collider 20m
Future muon colliders with center-of-mass energy of $\mathcal{O}(1-10)$ TeV can provide a clean high-energy environment with advantages in searches for TeV-scale axion-like particles (ALPs), pseudo-Nambu–Goldstone bosons associated with spontaneously broken global symmetries, which are widely predicted in physics beyond the Standard Model (SM).
We exploit ALP couplings to SM fermions, and guided by unitarity constraints, build a search strategy focusing on the ALP decay to top quark pairs.Speaker: Yufei Zhang -
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Electroweak phase transitions proceed via bubbles vs. domain walls (Remote) 20mSpeaker: Yun Jiang (SYSU)
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Coffee Break Catering Area茶歇区 (2nd Floor 光大二楼)
Catering Area茶歇区
2nd Floor 光大二楼
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HF/HI/QCD: Heavy Ion (2) Function Room 8 光大8号厅 (2nd Floor 光大二楼)
Function Room 8 光大8号厅
2nd Floor 光大二楼
Convener: Yaxian Mao (Central China Normal University)-
16:20
Study of strange hadron production in jets and the underlying events with ALICE 15mSpeaker: Lang Xu
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Study of beauty quark production properties via non-prompt D mesons with ALICE 15mSpeaker: 明宇 张 (华中师范大学)
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ALICE实验手征反常效应研究(Remote) 15mSpeaker: 淳正 王 (复旦大学)
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Measurement of the prompt and non-prompt J/Ψ production in Pb–Pb collisions at 5.02 TeV with ALICE 15mSpeaker: Senjie Zhu
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Study of jet quenching effects using jet-hadron correlations with ALICE(Remote) 15mSpeaker: Yongzhen Hou
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Instrumental: Silicon Tracker Function Room 1 光大1号厅 (2nd Floor 光大二楼)
Function Room 1 光大1号厅
2nd Floor 光大二楼
Convener: 煦昊 袁- 16:20
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SEE test of production ASICs in CSNS 15mSpeaker: Shaogang Peng (Tsing Hua University)
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A study on the feasibility of CSNS becoming an ATLAS ITk sensor QA irradiation site 15mSpeaker: Hui Li (Tsinghua University)
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Installation of LHCb Upstream Tracker 15mSpeaker: Xiaojie Jiang (IHEP(Beijing))
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TeV: Higgs (4) Function Room 10 光大10号厅 (2nd Floor 光大二楼)
Function Room 10 光大10号厅
2nd Floor 光大二楼
Convener: Lailin Xu (USTC)-
16:20
Probing the Higgs trilinear self-coupling through Higgs+jet production 20m
We present the calculation of the next-to-leading order corrections for Higgs+jet production at the Large Hadron Collider, that arise from the Higgs trilinear self-coupling ($\lambda_{HHH}$).
We use the method of large top-quark mass expansion to tackle the challenging two-loop virtual amplitude, and apply the Pad\'{e} approximation to extend the region of convergence of this expansion.
We find that the $\lambda_{HHH}$-related corrections amount to $0.66\%$ for the total cross section. For the invariant mass distribution and Higgs boson transverse momentum distribution, the corrections are mostly in the range $0.5\% \sim 0.7\%$. Our results can be used to set extra constraints on $\lambda_{HHH}$ from the experimental data.Speaker: 斌 周 (上海交通大学) -
16:40
Run2 combination of the Higgs boson decay to a Z boson and a photon at the LHC 15mSpeaker: Mingtao Zhang (PKU)
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Interpretations of the measurements of Higgs boson production and decay rates and differential cross-sections based on the Nature paper(remote) 15mSpeaker: Yifan Zhu (SJTU)
- 17:10
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Measurement of ttW/ttH production in multilepton final states with ATLAS Run-2 data 15mSpeaker: Chen Jia (山东大学)
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Measurement of Higgs boson decaying into bb ̅ using Run2 dataset at the ATLAS experiment 15mSpeaker: Jingyi Han (山东大学)
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Theory: QCD (2) Function Room 9 光大9号厅 (2nd Floor 光大二楼)
Function Room 9 光大9号厅
2nd Floor 光大二楼
Convener: Dingyu Shao-
16:20
Probing the spin-dependent fragmentation function in unpolarized pp and AA collisions at the LHC（Remote） 20m
The longitudinal spin transfer represents the probability density of producing longitudinally polarized hadrons from longitudinally polarized quarks or circularly polarized gluons. It thus was usually measured in polarized reactions or high-energy collisions where weak interaction dominates. In this work, we propose the dihadron polarization correlation as a novel probe of this quantity. Such an observable does not require the fragmenting partons to be polarized and therefore can be measured in the currently available experimental facilities, such as Belle, RHIC, Tevatron, and the LHC. We make quantitative predictions for these experiments. In light of the data already harvested, the experimental investigation of this observable provides more opportunity for the quantitative study of the longitudinal spin transfer. In particular, the measurements in $pp$ collisions can significantly constrain the fragmentation function of a circularly polarized gluon.
References
[1] Probing the longitudinal spin transfer via dihadron polarization correlations in unpolarized $e^+e^-$ and pp collisions, Hao-Cheng Zhang, Shu-Yi Wei, Phys. Lett. B 839 (2023) 137821.
[2] X. Li, Z.X. Chen, S. Cao, S.Y. Wei, arXiv:2309.09487 (2023).Speaker: Prof. Shu-Yi WEI (Shandong University) -
16:40
Hybrid Renormalization for Quasi Distribution Amplitudes of A Light Baryon 20m
We develop a hybrid scheme to renormalize quasi distribution amplitudes of a light baryon on the lattice, which combines the self-renormalization and ratio scheme. By employing self-renormalization, the UV divergences and linear divergence at large spatial separations in quasi distribution amplitudes are removed without introducing extra nonperturbative effects, while making a ratio with respect to the zero-momentum matrix element can properly remove the UV divergences in small spatial separations. As a specific application, distribution amplitudes of the Λ baryon made of uds are investigated, and the requisite equal-time correlators, which define quasi distribution amplitudes in coordinate space, are perturbatively calculated up to the next-to-leading order in strong coupling constant αs. These perturbative equal-time correlators are used to convert lattice QCD matrix elements to the continuum space during the renormalization process. Subsequently, quasi distribution amplitudes are matched onto lightcone distribution amplitudes by integrating out hard modes and the corresponding hard kernels are derived up to next-to-leading order in αs including the hybrid counterterms. These results are valuable in the lattice-based investigation of the lightcone distribution amplitudes of a light baryon from the first principles of QCD.
Speaker: Jialu Zhang (上海交通大学) -
17:00
Elliptic anisotropy of hard probes from parton scatterings in small collision systems 20m
The hard probes, including jets and heavy flavors, play an important role in investigating the properties of quark–gluon plasma (QGP) formed in heavy-ion collisions. The positive elliptic flow of hard probes observed in semi-central Pb--Pb collisions indicates that the hard partons suffered strong interactions in the deconfined QCD medium and then obtain the collectivity. However, recent measurements show also a non-zero $v_{2}$ for high-$p_{\mathrm{T}}$ charged particles and heavy flavor hadrons in high-multiplicity p--Pb collisions for both mid and forward rapidities, whose origin is still debated.
In this contribution, we employ a multi-phase transport model (AMPT) to calculate the $v_{2}$ of jet particles and open heavy-flavour hadron decay muons in p--Pb collisions at mid and forward rapidity, respectively. The results are obtained using the two-particle correlation method and the advanced nonflow subtraction strategy. We will systematically introduce how the collectivity of hard partons are generated from parton scatterings, and then propagated to the final state in small collision systems. Comparisons with experimental results will be presented as well. This work will provide further insights into understanding the origin of elliptic anisotropy of hard probes in small collision systems, and has referential value for the future measurements.
Speaker: 思宇 汤 (武汉纺织大学) -
17:20
Precise prediction for the top quark width 20m
We present the first analytic results of N3LO QCD corrections to the top-quark decay width. We focus on the dominant leading color contribution, which includes light-quark loops. At NNLO, this dominant contribution accounts for 95% of the total correction. The most precise prediction for the top-quark width is now 1.321 GeV for mt = 172.69 GeV.
Speaker: 烨凡 王 (Shandong university) -
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New perspectives on UV divergences of loops and the hierarchy problem 20mSpeaker: Lianbao Jia
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Banquet Ballroom 宴会厅 (2nd Floor 光大二楼)
Ballroom 宴会厅
2nd Floor 光大二楼
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HF/HI/QCD: Heavy Ion (3) Function Room 8 光大8号厅 (2nd Floor 光大二楼)
Function Room 8 光大8号厅
2nd Floor 光大二楼
Convener: Xiaoming Zhang (Central China Normal University)-
08:30
Probing the nuclear structure with multiparticle correlation in Xe–Xe collisions 15mSpeaker: Zhiyong Lu (CIAE(中国原子能科学研究院))
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Measurement of inclusive J/Ψ and Ψ(2S) production at midrapidity in pp collisions at 13.6 TeV with ALICE 15mSpeaker: Zhang Yuan
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Non-prompt J/Ψ production in pp collisions with ALICE 15mSpeaker: Wenda Guo (Central China Normal University)
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Measurement of inclusive J/Ψ polarization at midrapidity in pp collisions at 13.6 TeV with ALICE 15mSpeaker: Zhenjun Xiong
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Ξc0 production vs multiplicity via hadronic decay in pp at 13 TeV 15mSpeaker: Tao Fang
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Instrumental: CEPC Function Room 1 光大1号厅 (2nd Floor 光大二楼)
Function Room 1 光大1号厅
2nd Floor 光大二楼
Convener: Manqi RUAN (Institute of High Energy Physics, Beijing, China)-
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Status of Progress of CEPC Calorimeter R&D 20mSpeaker: Prof. Yong Liu (IHEP)
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Consideration on CEPC Electronics 20mSpeaker: Prof. Wei Wei (IHEP)
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TeV: BSM (1) Function Room 10 光大10号厅 (2nd Floor 光大二楼)
Function Room 10 光大10号厅
2nd Floor 光大二楼
Convener: Da Xu (IHEP, CAS)-
08:30
[Cancel] Mono-X Signatures of an Absorbed Fermionic Dark Matter at the LHC 20mSpeaker: Kai Ma (Shaanxi University of Technology)
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Search for direct production of electroweakinos in final states with one lepton, jets and missing transverse momentum with the ATLAS detector 15mSpeaker: Mingjie Zhai (IHEP)
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Search for direct production of stau pairs in $\sqrt{s} = 13$ TeV $pp$ collisions with the ATLAS detector 15mSpeaker: 蕾 郭 (IHEP)
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Search for lepton-flavour violation in high-mass dilepton final states using ATLAS run2 data 15mSpeaker: Luxin Zhang (中国科学技术大学)
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09:35
Search for dark photons in rare Z boson decays with the ATLAS detector 15mSpeaker: Mingyi Liu (USTC)
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09:50
First Results from the Search for Dark Photons with the FASER Detector at the LHC 15mSpeaker: Hao Pang (清华大学)
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Search for 𝒕𝒕𝑯/𝑨 → 𝒕𝒕𝒕𝒕 production in a final state 2 with one lepton or two opposite-sign leptons using the full Run 2 𝒑𝒑 collisions data at √𝒔 = 13 TeV 15mSpeaker: Lining Mao (SJTU)
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Theory: EFT/EW Function Room 9 光大9号厅 (2nd Floor 光大二楼)
Function Room 9 光大9号厅
2nd Floor 光大二楼
Convener: Jun Gao-
08:30
Operators Correlation in Electroweak Scattering at LHC 20m
To probe new physics without prior assumptions on UV models, the correlation of operators could be crucial in exposing the structure of UV completion.
When operators arise from the same heavy resonance, they are likely to correlate and their Wilson coefficients exhibit non-trivial relation, since both of them depend on the same UV parameters.
The aim of EFT analysis is to discover the correlation among operators, which might shed lights on UV completion.
For specific, if a precise measurement is consistent with the SM theory prediction, it might originate from a coherent cancellation among higher dimensional operators.
In this work, we investigate a strongly correlated cancellation of operators in electroweak scattering and attempt to expose the corresponding UV structure.
We also examine the operators correlation through a coupled channel analysis method and demonstrate that this correlation persists even when considering the uncertainties at HL-LHC.
On the other hand, since the operators connect different scattering channels through the reduction of $H$ into $v$ or $h$, the operators correlation in single top production will predict the total cross section of $thq$ production, and the correlation in $pp\to h\gamma$ can precisely examine the new physics effects of the indirect search on the weak magnetic moment $a_W$.Speaker: Jian-Nan Ding (Peking University) -
08:50
Probing positivity at LHC with exclusive photon-fusion processes 20m
By tagging one or two intact protons in the forward direction, it is possible to select and measure exclusive photon-fusion processes at the LHC. The same processes can also be measured in heavy ion collisions, and are often denoted as ultraperipheral collisions (UPC) processes. Such measurements opens up the possibility to probe certain dimension-8 operators and their positivity bounds at the LHC. As an demonstration, we perform a phenomenological study on the $\gamma\gamma\to \ell^+\ell^-$ processes, and find out that the measurements of this process at the HL-LHC provides reaches on certain dimension-8 operator coefficients that are comparable to the ones at future lepton colliders. We also point out that the $\gamma q\to \gamma q$ process could potentially have better reaches on similar types of operators due to its larger cross section, but a more detailed experimental study is need to estimate the background of this process. The validity of effective field theory (EFT) and the robustness of the positivity interpretation are also discussed.
Speaker: Chi Shu (Fudan University) -
09:10
Explaining the CDF W-mass shift and $(g-2)_\mu$ in a $Z^\prime$ scenario and its implications for the b \to s \ell^+ \ell^- processes 20m
In the past few years, several indirect hints for New Physics beyond the SM arose in precision measurements, e.g., $(g-2)_\mu$ and the W-boson mass. In this work, we consider a model containing new vector-like Fermion partner gauged under a new $U(1)^\prime$ symmetry. It is found that the latest CDF $m_W$ measurement and $(g-2)_\mu$ can be simultaneously accommodated. We have also considered several other experimental constraints, including the neutrino trident production, $Z \to \mu \mu$ decay, dimuon resonance searches at the LHC, etc. Implications for the $b \to s \ell^+ \ell^-$ process will be discussed. (This work is based on 2205.02205 and 2307.05290.)
Speaker: 袁 兴博 (CCNU) -
09:30
Double Parton Scattering Effect in the Measurement of W-Mass 20m
Recently, the $W$ boson mass measured by the CDF-II collaboration shows large tension with the standard model prediction and other measurements. In this work, we look into the double parton scattering (DPS) contribution in CDF-II W mass measurement. We show that the DPS process can increase the measured mass as $\Delta M_W=20-200~\mbox{MeV}$ for the missing transverse momentum fit and $\Delta M_W=0-50~\mbox{MeV}$ for the transverse mass fit. It is comparable to the W-mass tension and should be take into consideration. The DPS effect can also appears in other inclusive measurements, since it contributes $\sim10^{-2}$ events in total and cause a $\mathcal{O}(10^{-2})-\mathcal{O}(10^{-1})~\mbox{GeV}$ shift of the missing transverse momentum.
Speaker: Rui Zhang (IHEP) -
09:50
Massive Scattering Amplitudes for Standard Model: On-shell Massless-Massive Correspondence 20m
We organize massive tree-level amplitudes in Standard Model by power counting and helicity category, and match them with their high energy origins. The construction of massive amplitudes is based on the massive bootstrap method, decomposing internal and external structures, and the existing leading orders of massless-massive correspondence. For the matching of higher order components, we introduce the on-shell Higgsing mechanism first proposed by (R. Balkin et al., 2022) and further the discussion to propagators.
Speaker: 郁涵 倪 (Institute of Theoretical Physics, Chinese Academy of Sciences) -
10:10
MatchingEFT.jl: An Automated Tool for Tree and One-Loop Level Matching 20m
We present MatchingEFT.jl, an automated tool to extract hard region contribution of the tree-level and one-loop 1PI amplitude, which can be matched to the standard model effective theory (SMEFT) operator basis in ABC4EFT.
FeAnGen4EFT performs the feynman diagram generation for the specific scattering process using the designed universal feynrules output file (UFO) and Qgraf. It offers the designated Feynman diagrams' amplitudes explicitly to provide non-trivial check for the gauge invariance. It will use FORM script to process extracting hard region expansion for the output from the previous step. These results will be given in a physical basis such as P-basis and Y-basis in ABC4EFT by using the on-shell amplitude basis method for a further crosscheck. FeAmGen4SMEFT has been built with lightweight, generality, flexibility, specialization, and efficiency in mind.
These ingredients allow FeAmGen4SMEFT to have more applications beyond the matching based on the complete operator basis with the specific mass dimension offered by ABC4EFT. One of these applications includes the one-loop renormalization of arbitrary theories.
We have performed one-loop matching for some processes under the specified UV model and obtained consistent results with other papers.Speaker: 成杰 杨 (高能物理研究所&理论物理研究所)
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Coffee Break 2nd Floor 光大二楼
2nd Floor 光大二楼
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Closed Meetings for Theory and Experiments Function Room 1, 8, 9, 10 光大1, 8, 9, 10号厅 (2nd Floor 光大二楼)
Function Room 1, 8, 9, 10 光大1, 8, 9, 10号厅
2nd Floor 光大二楼
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Poster Session Catering Area 茶歇区 (2nd Floor 光大二楼)
Catering Area 茶歇区
2nd Floor 光大二楼
Conveners: Jiayin Gu (Fudan University), Prof. Liang Li (Shanghai Jiao Tong University), Yanping Huang (IHEP), 震 胡 (清华大学)-
10:50
b-tagging trigger calibraion with ttbar event 1mSpeaker: Yuhui Miao
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Improved Asymptotic Formulae for Statistical Interpretation Based on Likelihood Ratio Tests 1m
In this work, we try to improve the classic asymptotic formulae to describe the probability distribution of likelihood-ratio statistical tests. The idea is to split the probability distribution function into two parts. One part is universal and described by the asymptotic formulae. The other part is case-dependent and estimated explicitly using a 6-bin model proposed in this work. The latter is similar to doing toy simulations and hence is able to predict the discrete structures in the probability distributions. The new asymptotic formulae provide a much better differential description of the test statistics. The better performance is confirmed in two toy examples.
Speaker: yan zhang (南京大学) - 10:52
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Search for Higgs pairs in the bbyy final state with the ATLAS Experiment 1mSpeaker: Qiuping Shen (SJTU/TDLI)
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Performance and Calibration of quark/gluon jet tagger and search for new resonances with quark/gluon tagged dijet events 1mSpeaker: Wanyun Su (TDLI, SJTU)
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Test results of Quality Control Test Structure of the USTC-IME LGAD pre-production 1mSpeaker: Haoquan Ren
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Improvement of jet reconstruction in forward region with time information from HGTD. 1mSpeaker: Zhijie Li
- 10:57
- 10:58
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Dark Photon search initiative at SHINE facility (Dark SHINE) 1mSpeaker: Jing Chen (SJTU/TDLI)
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Dark SHINE Simulation software framework 1mSpeaker: Xuliang Zhu (TDLI, SJTU)
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R&D of Dark SHINE LYSO Crystal ECAL 1mSpeaker: Zhiyu Zhao (TDLI, SJTU)
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R&D of Dark SHINE Hadronic Calorimeter (HCAL) 1mSpeakers: Chunxiang Zhu (SJTU/TDLI), Rui Yuan (TDLI, SJTU), Zhen Wang (TDLI, SJTU)
- 11:03
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Development of readout electronics for Dark SHINE ECAL 1mSpeakers: Jiannan Tang (SJTU), Weihao Wu (SJTU), Yihan Guo (SJTU)
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Particle physics opportunities at the Shanghai SHINE facility with secondary beams 1mSpeaker: Prof. Kim Siang Khaw (TDLI, SJTU)
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Simulation study of the muon flux produced by 1.6 GeV electrons in a beam dump 1mSpeaker: Mr Fangchao Liu (SJTU)
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Development of a muon spin polarization monitor for the J-PARC Muon g-2/EDM experiment 1mSpeaker: Meng Lyu (TDLI, SJTU)
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Muon Lifetime Measurement with Run-1 data of Muon g-2 Experiment at Fermilab 1mSpeaker: Zejia Lu (SJTU)
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Development of a muon entrance trigger system for the PSI muEDM experiment 1mSpeaker: Tianqi Hu (TDLI, SJTU)
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Performance of a prototype PSI muEDM muon entrance detector measured with test beam data 1mSpeaker: Guan Ming Wong (TDLI, SJTU)
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Reconstruction of Neutrino Events in TRIDENT Project based on GNN 1mSpeaker: Cen Mo (SJTU)
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Lunch: - Function Room 6, 7, 11 光大6、7、11号厅 Function Room 6, 7, 11 光大6、7、11号厅 (2nd Floor 光大二楼)
Function Room 6, 7, 11 光大6、7、11号厅
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Break 2h
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Public Lecture 上海交通大学闵行校区（东川路800号）理科楼5号楼3楼300报告厅 (Science Building)
上海交通大学闵行校区（东川路800号）理科楼5号楼3楼300报告厅
Science Building
上海交通大学闵行校区（东川路800号）理科楼5号楼3楼300报告厅 800 Dongchuan Road, Minhang District. Shanghai Jiao Tong University Minhang Campus, New Science Building #5, Room 300.-
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“小爆炸”：相对论重离子碰撞 1hSpeaker: Prof. Yugang Ma (Fudan Univ. (CN))
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10:15
Plenary Session Ballroom 宴会厅 (2nd Floor 光大二楼)
Ballroom 宴会厅
2nd Floor 光大二楼
Convener: Daicui Zhou (CCNU)-
08:30
Theory overview: Heavy ion physics 30mSpeaker: Weiyao Ke (Central China Normal University)
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09:00
ALICE实验中奇异强子的产生 25mSpeaker: Zhongbao Yin (CCNU)
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09:25
ALICE实验中重夸克的产生与输运 25mSpeaker: 忻烨 彭
- 09:50
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08:30
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10:15
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10:35
Coffee Break Catering Area茶歇区 (2nd Floor 光大二楼)
Catering Area茶歇区
2nd Floor 光大二楼
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10:35
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12:20
Plenary Session: - Ballroom宴会厅 Ballroom 宴会厅 (2nd Floor 光大二楼)
Ballroom 宴会厅
2nd Floor 光大二楼
Convener: Michael Ramsey-Musolf (TDLI/SJTU)-
10:35
Theory Overview: Neutrino Physics 30mSpeaker: Gang Li (Sun Yat-Sen University)
- 11:05
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11:30
Dark matter and unconventional searches at the LHC 25mSpeaker: Ning Zhou (Shanghai Jiao Tong University)
- 11:55
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10:35
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12:20
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14:00
Lunch Function Room 6, 7, 11 光大6、7、11号厅 (2nd Floor 光大二楼)
Function Room 6, 7, 11 光大6、7、11号厅
2nd Floor 光大二楼
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14:00
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16:00
HF/HI/QCD: QCD+mist. Function Room 8 光大8号厅 (2nd Floor 光大二楼)
Function Room 8 光大8号厅
2nd Floor 光大二楼
Convener: 黎明 张 (清华大学)-
14:00
Resolving negative cross section of quarkonium hadroproduction using soft gluon factorization 20m
It was found that, using nonrelativistic QCD factorization, the predicted $\chi_{cJ}$ hadroproduction cross section at large $p_T$ can be negative. The negative cross sections originate from terms proportional to plus function in ${^{3}\hspace{-0.6mm}P_{J}^{[1]}}$ channels, which are remnants of the infrared subtraction in matching the ${^{3}\hspace{-0.6mm}P_{J}^{[1]}}$ short-distance coefficients. In this article, we find that the above terms can be factorized into the nonperturbative ${^{3}\hspace{-0.6mm}S_{1}^{[8]}}$ soft gluon distribution function in the soft gluon factorization (SGF) framework. Therefore, the problem can be naturally resolved in SGF. With an appropriate choice of nonperturbative parameters, the SGF can indeed give positive predictions for $\chi_{cJ}$ production rates within the whole $p_T$ region. The production of $\psi(2S)$ is also discussed, and there is no negative cross section problem.
Speaker: An-Ping Chen (Jiangxi Normal University) -
14:20
Observation and differential cross-section measurements of electroweak 𝑾𝜸𝒋𝒋 production in 𝒑𝒑 collisions at √𝒔 = 13 TeV with the ATLAS detector (Remote) 15mSpeaker: Zhen Wang (TDLI, SJTU)
- 14:35
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14:50
First Direct Observation of Collider Neutrinos with FASER 15mSpeaker: Jinfeng Liu (Tsinghua Univ.)
- 15:05
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15:20
Combination and summary of ATLAS dark matter searches interpreted in the context of 2HDM+a 15mSpeaker: Ngoc Khanh Vu (Tsung-Dao Lee Institute, Shanghai Jiao Tong University)
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14:00
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14:00
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16:00
Instrumental: Gasous detector/electronics/computing Function Room 1 光大1号厅 (2nd Floor 光大二楼)
Function Room 1 光大1号厅
2nd Floor 光大二楼
Convener: Dayong Wang (Peking University)-
14:00
Progress of the RPC development towards the producition for ATLAS Phase-II upgrade 15mSpeaker: Dongshuo Du (USTC)
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14:15
CMS-GEM upgrade progress and GEM assembly at Peking University 15mSpeaker: Chuqiao Jiang (PKU)
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14:30
CMS-GEM ME0 electronics board design, prototyping and production plan 15mSpeaker: Zhe Li (PKU)
- 14:45
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15:00
Data analsys for iRPC BE/TRG beam test 15mSpeaker: Weizhuo Diao (IHEP)
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15:15
Grid computing for LHC experiments in China 15mSpeaker: Xiaowei JIANG (IHEP)
- 15:30
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14:00
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14:00
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16:00
TeV: EW+top Function Room 10 光大10号厅 (2nd Floor 光大二楼)
Function Room 10 光大10号厅
2nd Floor 光大二楼
Convener: Chen Zhou (Peking University)-
14:00
Observation of WZy production in pp collicisions with ATLAS detector 15mSpeaker: Xiaocong Ai (Zhengzhou Univ.)
- 14:15
- 14:30
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14:45
ZZ cross section measurement at 13.6TeV with the ATLAS detector 15mSpeaker: Xingyu Wu (USTC)
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15:00
Evidence of pair-production of longitudinally polarized vector bosons in ZZ4l final states 15mSpeaker: Dongshuo Du (USTC)
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15:15
Precise measurement of Z𝜸+jets final state and search for neutral triple gauge couplings 15mSpeaker: Danning Liu (TDLI, SJTU)
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15:30
Observation and measurement of the cross-sections of the electroweak and total production of a Z𝜸 pair in association with two jets in pp collisions at √s = 13TeV with the ATLAS detector (remote) 15mSpeaker: Qibin LIU (TDLI, SJTU)
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15:45
Observation of Four-Top-Quark Production in the Multi-lepton Final State with the ATLAS Experiment (remote) 15mSpeaker: Xiang Chen (SJTU)
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14:00
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14:00
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16:00
Theory: Higgs/EWPT Function Room 9 光大9号厅 (2nd Floor 光大二楼)
Function Room 9 光大9号厅
2nd Floor 光大二楼
Convener: Gang Li (Sun Yat-Sen University)-
14:00
Cosmological Phase Transitions in Composite Higgs Models 20m
We investigate cosmological phase transitions in various composite Higgs models consisting of four-dimensional asymptotically-free gauge field theories. Each model may lead to a confinementdeconfinement transition and a phase transition associated with the spontaneous breaking of a global symmetry that realizes the Standard Model Higgs field as a pseudo-Nambu-Goldstone boson. Based on the argument of universality, we discuss the order of the phase transition associated with the global symmetry breaking by studying the renormalization group flow of the corresponding linear sigma model at finite temperature, which is calculated by utilizing the ε-expansion technique at the one-loop order. Our analysis indicates that some composite Higgs models accommodate phenomenologically interesting first-order phase transitions.
Speaker: Yaoduo Wang (TDLI, SJTU) -
14:20
Lattice study of singlet-assisted electroweak phase transition 20m
In this study, we use lattice to reveal nonperturbative information of the electroweak phase transition in the real-singlet extension of the Standard Model, based on the 2-loop 3D EFT framework.
Importantly, the new information is that the lattice determines the true nature of the electroweak phase transition, capable to identify it as the first order type or not, an important qualitative behavior to which perturbation theory is blind. In scenarios where perturbation theory implies a weakly first order phase transition, lattice is always more reliable than the perturbation theory. In this regime, the symmetry-breaking transition may be crossover rather than a true phase transition. On the other hand, for strong transitions, both methods yield quantitatively close results, particularly when 2-loop perturbation theory is used.
This nonperturbative framework holds potential for other Higgs-sector extensions of the SM. Besides, by holding two powerful tools, 2-loop perturbation scanning and lattice, we will explore associated phenomenology in the future.
Speaker: Guotao Xia (TDLI, SJTU) -
14:40
利用有限温度有效理论研究电弱相变 20mSpeaker: 仁晖 覃 (重庆大学)
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15:00
Electroweak sphalerons, scalar multiplets, and symmetry breaking patterns 20m
In this study, we present a comprehensive analysis of the electroweak sphaleron formalism and its application to electroweak phase transition (EWPT) patterns in extensions of the Standard Model scalar sector with electroweak multiplets. We offer an equivalence proof for different choices for the form of sphaleron configurations; construct the previously unestablished high-dimensional $\text{SU}(2)$ sphaleron transformation matrix; investigate the scalar multiplet topology map and baryon number charge relation; and revisit the required boundary conditions needed for solving the sphaleron field equations. We then scrutinize the leading order sphaleron dynamics in the context of a multi-step EWPT. We showcase two distinct analytical approaches for extending the $\text{SU}(2)$ scalar multiplet to the standard model (SM) under differing EWPT scenarios, and perform an explicit calculation of the sphaleron energy using a septuplet example. In the context of a single-step EWPT leading to a mixed phase, we find that the additional multiplet's contribution to the sphaleron energy is negligible, primarily due to the prevailing constraint imposed by the $\rho$ parameter. Conversely, in a two-step EWPT scenario, the sphaleron energy can achieve significantly high values during the initial phase, thereby markedly preserving baryon asymmetry if the universe undergoes a first-order EWPT. In both cases, we delineate the relationship between the sphaleron energy and the parameters relevant to dark matter phenomenology.
Speaker: Yanda Wu (TDLI, SJTU) - 15:20
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15:40
Testing Complex Singlet Scalar Cosmology at the Large Hadron Collider 20mSpeaker: Wenxing Zhang (SJTU)
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14:00
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16:00
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16:20
Coffee Break Catering Area茶歇区 (2nd Floor 光大二楼)
Catering Area茶歇区
2nd Floor 光大二楼
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16:20
→
18:20
HF/HI/QCD: free Function Room 8 光大8号厅 (2nd Floor 光大二楼)
Function Room 8 光大8号厅
2nd Floor 光大二楼
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16:20
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18:20
Instrumental: Performance Function Room 1 光大1号厅 (2nd Floor 光大二楼)
Function Room 1 光大1号厅
2nd Floor 光大二楼
Convener: 京周 赵- 16:20
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16:35
Optimal transport solutions for pileup mitigation at hadron colliders (Remote) 15mSpeaker: Fabio Iemmi
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16:50
Ultimate calibration and performance of the CMS Electromagnetic Calorimeter in LHC Run 2(Remote) 15mSpeaker: Jin Wang (IHEP)
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17:05
RPC operation in the ATLAS experiment(Remote) 15mSpeaker: Zaazoua Mohamed
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17:20
Tau trigger scale factor studies 15mSpeakers: Botao Guo (Peking University), Prof. Xiaohu SUN (Peking University)
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17:35
CMS DQM-DC operations and performance during Run3 data-taking 15mSpeaker: Tahir Javaid
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17:50
Constituent-based W-boson tagging with the ATLAS detector 15mSpeaker: Shudong (书栋) Wang (王) (IHEP, CAS)
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18:05
Performance of heavy flavour jet identification in boosted topologies with full Run2 data 15mSpeaker: Congqiao Li (Peking University)
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16:20
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18:20
TeV: BSM (2) Function Room 10 光大10号厅 (2nd Floor 光大二楼)
Function Room 10 光大10号厅
2nd Floor 光大二楼
Convener: Junquan (军全) Tao (陶) (IHEP, CAS)-
16:20
Search for heavy Higgs bosons decaying to atop quark pair with the ATLAS detector 15mSpeaker: Yizhou Cai
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16:35
Searchfor the a new high-mass resonances decaying into Zγ final state in pp collisions at √s = 13 TeV with the ATLAS detector 15mSpeaker: Fabio Alves
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16:50
Search forleptoquarks decaying into the bτ final state in pp collisions at √s = 13TeVwith the ATLASdetector 15mSpeaker: Yimin Che
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17:05
Search for the production of an excited bottom quark decaying to tW (leptonic top + hadronic W) in pp collisions at 13 TeV (CMS) 15mSpeaker: Baorui Hou (IHEP)
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17:20
Search for a new heavy boson W' decaying to a top quark and a bottom quark with the ATLAS detector 15mSpeaker: Rui Yuan (TDLI, SJTU)
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17:35
A search for heavy right-handed Majorana neutrinos with ATLAS 15mSpeaker: Tongbin Zhao (山东大学)
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16:20
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16:20
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18:20
Theory: Heavy Flavor Function Room 9 光大9号厅 (2nd Floor 光大二楼)
Function Room 9 光大9号厅
2nd Floor 光大二楼
Convener: Xiaoping Wang (Beijing University)-
16:20
$B \to D$ form factors beyond leading power and extraction of $|V_{cb}|$ and $R(D)$ 20mSpeaker: Yan-bing Wei (BJUT)
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16:40
$B_{(s)} \rightarrow D^{**}_{(s)}$ form factors in HQEFT and model independent analysis of relevant semileptonic decays with NP effects 20m
The form factors of $B_{(s)}$ decays into P-wave excited charmed mesons (including $D^*_0(2300)$, $D_1(2430)$, $D_1(2420)$, $D^*_2(2460)$ and their strange counterparts, denoted generically as $D^{**}_{(s)}$) are systematically calculated via QCD sum rules in the framework of heavy quark effective field theory (HQEFT). We consider contributions up to the next leading order of heavy quark expansion and give all the relevant form factors, including the scalar and tensor ones only relevant for possible new physics effects. The expressions for the form factors in terms of several universal wave functions are derived via heavy quark expansion. These universal functions can be evaluated through QCD sum rules. Then, the numerical results of the form factors are presented. With the form factors given here, a model independent analysis of relevant semileptonic decays $B_{(s)} \rightarrow D^{**}_{(s)} l \bar{\nu}_l$ is performed, including the contributions from possible new physics effects. Our predictions for the differential decay widths, branching fractions and ratios of branching fractions $R(D^{**}_{(s)})$ may be tested in more precise experiments in the future.
Speaker: Dr 亚兵 左 (辽宁师范大学) -
17:00
Possible large CP violation in charmed Lambda_b decays 20m
We propose that the cascade decay $\Lambda_b \to D(\to K^+\pi^-) N(\to p\pi^-)$ may serve as the discovery channel for baryonic CP violation. This decay chain is contributed by dominantly the amplitudes with the intermediate $D$ state as $D^0$ or $\bar{D}^0$. The large weak phase between the two kinds of amplitudes suggests the possibility of significant CP violation. While the presence of undetermined strong phases may complicate the dependence of CP asymmetry, our phenomenological analysis demonstrates that CP violation remains prominent across a broad range of strong phases. The mechanism also applies to similar decay modes such as $\Lambda_b \rightarrow D(\rightarrow K^+ K^-) \Lambda$. Considering the anticipated luminosity of LHCb, we conclude that these decay channels offer a promising opportunity to uncover CP violation in the baryon sector.
Speaker: Yin-Fa Shen (HUST) -
17:20
Limiting FCNC induced by a CP symmetry of order 4 20m
CP4 3HDM is a three-Higgs-doublet model based on the CP symmetry of order 4 (CP4). Imposing CP4 leads to remarkable connections between the scalar and Yukawa sectors and unavoidably generates tree-level flavor-changing neutral couplings (FCNC). It remains unclear whether FCNC can be sufficiently suppressed in the CP4 3HDM. In this paper, we systematically explore this issue. We first develop an efficient scanning procedure which takes the quark masses and mixing as input and expresses the FCNC matrices in terms of physical quark observables and quark rotation parameters. This procedure allows us to explore the FCNC effects for all the Yukawa sectors possible within the CP4 3HDM. We find that, out of the eight possible CP4 Yukawa sectors, only two scenarios are compatible with the K, B, Bs and, in particular, D-meson oscillation constraints. The results of this work serve as clear guidelines for future phenomenological scans of the model.
Speaker: Duanyang Zhao (中山大学) -
17:40
Double-mixing CP violation 20m
We propose a new kind of CP violation effect — the double-mixing CP asymmetry — in a type of cascade decays that involves at least two mixing neutral mesons in the decay chain. It is induced by the interference between different oscillation paths of the neutral mesons in the decay process. The double-mixing CP asymmetry is of critical importance for phenomenology, providing opportunities for clean determination of CKM phase angles free of uncertainties induced by the strong dynamics. To illustrate this point, we perform a phenomenological analysis on two examples: $B^0_s \to \rho^0 K \to \rho^0 (\pi^- \ell^+ \nu_\ell)$ and $B^0 \to D^0 K \to D^0(\pi^+ \ell^- \bar{\nu}_\ell)$. Our results demonstrate that the double-mixing CP asymmetry can be numerically significant in the absence of strong phases, as shown by the former example. Additionally, the latter example showcases the direct extraction of weak and strong phases from data, without the need for theoretical inputs.
Speaker: wen jie Song (华中科技大学) -
18:00
Muon collider signatures for a $Z'$ with a maximal $\mu - \tau$ coupling in $U(1)_{L_\mu - L_\tau}$ 20mSpeaker: Dr Fei Huang (UJN)
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16:20
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08:30
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10:15
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08:30
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10:15
Plenary Session Ballroom 宴会厅 (2nd Floor 光大二楼)
Ballroom 宴会厅
2nd Floor 光大二楼
Convener: Prof. Yuehong Xie (CCNU)-
08:30
Theory overview: Heavy flavor physics 30mSpeaker: Prof. 月龙 沈 (Ocean University of China)
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09:00
CPV 25mSpeaker: Prof. Wenbin Qian (University of Chinese Academy of Sciences)
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09:25
Search for rare decays at LHCb 25mSpeaker: Jibo He (University of Chinese Academy of Sciences)
- 09:50
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08:30
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10:15
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10:35
Coffee Break Catering Area 茶歇区 (2nd Floor 光大二楼)
Catering Area 茶歇区
2nd Floor 光大二楼
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10:35
→
11:55
Plenary Session: - Ballroom宴会厅 Ballroom 宴会厅 (2nd Floor 光大二楼)
Ballroom 宴会厅
2nd Floor 光大二楼
Convener: Prof. Jianchun Wang (IHEP)-
10:35
Machine Learning at LHC 25mSpeaker: Dr Rui Zhang (University of Wisconsin-Madison)
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11:00
Exotics (non-SUSY) searches at the LHC (+Flavor) 25mSpeaker: Prof. Chengping Shen (Fudan Univ.)
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11:25
Theory overview: New Physics at the LHC: SMEFT and Beyond 30mSpeaker: Prof. Hong-Jian He (SJTU/TDLI)
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10:35
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11:55
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12:20
Closing 2nd Floor 光大二楼
2nd Floor 光大二楼
Convener: Prof. Jianchun Wang (IHEP)- 11:55
- 12:10
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12:20
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14:00
Lunch Function Room 6, 7, 11 光大6、7、11号厅 (2nd Floor 光大二楼)
Function Room 6, 7, 11 光大6、7、11号厅
2nd Floor 光大二楼
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08:30
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10:15
