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Roman Pasechnik (Lund University)18/12/2025, 09:00
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Pedro Bittar (Perimeter Insitute)18/12/2025, 10:45
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Prof. 玉鑫 刘 (北京大学)18/12/2025, 14:00
本讲座以强相互作用物质相变的观点简要讨论可见物质粒子及其质量的起源，包括由其基本现象归结为相变的物理机制、强关联非微扰系统相变的判据、以及相关研究的进展现状。
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Shinya Kanemura (Osaka University)18/12/2025, 15:45
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Prof. Wen-Long Zuo （Dean） (电子科技大学)19/12/2025, 08:20
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Qiang Li (Peking University)19/12/2025, 08:30
Some recent progresses will be introduced from the LHC CMS experiment on multi-boson physics, including, e.g., studying anomalous couplings from Same-Sign WWH, probing boosted Higgs through the WW decay channel, and searching for diboson resonances such as Higgs plus a photon.
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Zirui Wang (Fudan University (CN))19/12/2025, 09:00
The discovery of the Higgs boson has opened a new window into physics beyond the Standard Model. In this talk, I will discuss how the Higgs serves as a unique tool to probe the Dark Sector. I will cover three complementary strategies: constraining Dark Matter models via precision Higgs coupling measurements, performing direct Higgs portal searches, and exploring extended Higgs sectors that...
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Meng Xiao (Zhejiang university)19/12/2025, 09:30
该报告介绍最近cms实验上的希格斯物理方面的最新进展。
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Bingxuan Liu (Shenzhen Campus of Sun Yat-sen University)19/12/2025, 10:00
Higgs decaying to LLPs is an important part of the LLP search. In the past decade, ATLAS has established a comprehensive search programme covering a wide range of lifetimes. Due to the reconstruction and triggering challenges, dedicated analysis strategies have to be crafted, often resulting in analyses optimised for a very particular phase space. I will give a chronical review of how ATLAS...
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Jian Wang (Shandong University)19/12/2025, 10:40
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Lingfeng Li19/12/2025, 11:10
In this talk we present a phenomenological search for exotic Higgs decays to light BSM particles at future muon colliders.
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Pedro Bittar (Perimeter Insitute)19/12/2025, 11:40
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Wanda Isnard (University of Lyon 1, IP2I (France))19/12/2025, 12:10
Extra-dimensions are a very interesting tool to address various missing parts of the Standard Model of particle physics. When one extra-dimension is added, a compactification based on a orbifold is required to ensure a chiral spectrum for the fermions. It also allows mechanisms to consistently break the bulk gauge group. Symmetry breaking on orbifolds can be understood in two different ways:...
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Yanping Huang (IHEP)19/12/2025, 13:45
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Chen Zhou (Peking University)19/12/2025, 14:15
The ATLAS and CMS experiments are unique drivers of our fundamental understanding of nature at the energy frontier. In this contribution to the update of the European Strategy for Particle Physics, we update the physics reach of these experiments at the High-Luminosity LHC (HL-LHC) in a few key areas where they will dominate the state-of-the-art for decades to come.
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haotian Liu19/12/2025, 14:45
This talk will present a key advancement from the ATLAS experiment in probing the rare decay of the Higgs boson to a pair of muons (H→μμ). By analysing the new proton-proton collision data from LHC Run 3 (2022-2024) and combining it with Run 2 data, incorporating several technical improvements, we have performed the most sensitive combined measurement to date. The result provides the first...
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Yongchao Zhang (Southeast University)19/12/2025, 15:20
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铮 孙 (四川大学)19/12/2025, 15:50
In addition to the well-known quantum chromodynamical theta angle, we show that the Standard Model has another theta angle which is invariant under arbitrary chiral rotations of quarks and leptons. The new theta angle coincides with the quantum electrodynamical theta angle, which may be observable in a spacetime with nontrivial topology, either beyond the visible universe or in an effective...
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Qing-Hong Cao (Peking University)19/12/2025, 16:30
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Xinchou Lou (IHEP)20/12/2025, 08:15
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Ning Zhou (Shanghai Jiao Tong University)20/12/2025, 08:45
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Shu Li (TDLI, SJTU)20/12/2025, 09:15
Ref. Phys. Rev. Lett. 134 (2025) 121801
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A search is performed for dark matter particles produced in association with a resonantly produced pair of b-quarks with $30 < m_{bb} < 150$ GeV using 140 fb$^{−1}$ of proton-proton collisions at a center-of-mass energy of 13 TeV recorded by the ATLAS detector at the LHC. This signature is expected in extensions of the Standard Model predicting the... -
Manqi RUAN (Institute of High Energy Physics, Beijing, China)20/12/2025, 09:45
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Jiang-Hao Yu20/12/2025, 10:30
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Yang Zhang (University of Science and Technology of China)20/12/2025, 11:00
In this talk, we present our recent work at the frontier of multi-loop Feynman integrals and scattering amplitudes for precision physics. We have analytically computed two-loop six-point and three-loop five-point integrals, which represent the current state of the art in analytic Feynman integrals. Using these results and new reduction tools based on algebraic geometry, we have calculated the...
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Xuan Chen (Shandong University)20/12/2025, 11:30
In this talk I would like to introduce the state-of-the-art parton level event generator NNLOJET and its application to precision phenomenology of the Higgs boson. The main theory uncertainties of the Higgs boson production at hadron collider are from the parton distribution functions and determination of the strong coupling alpha_s. We have made NNLO QCD accurate PDF grids to help improve...
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Dingyu Shao20/12/2025, 12:00
Modern collider phenomenology requires unprecedented precision for the theoretical predictions, for which slicing techniques provide an essential tool at next-to-next-to-leading order (NNLO) in the strong coupling. The most popular slicing variable is based on the transverse momentum qT of a color-singlet final state, but its generalization to final states with jets is known to be very...
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玉鑫 刘 (北京大学)20/12/2025, 13:45
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Heng-Tong Ding (Central China Normal University)20/12/2025, 14:15
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Mei Huang (University of Chinese Academy of Sciences(UCAS))20/12/2025, 14:45
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Roman Pasechnik (Lund University)20/12/2025, 15:15
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Shinya Kanemura (Osaka University)20/12/2025, 16:00
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Jiayin Gu (Fudan University)20/12/2025, 16:30
Parameters in an effective field theory can be subject to certain positivity bounds if one requires a UV completion that obeys the fundamental principles of quantum field theory. These bounds are relatively straightforward at the tree level, but would become more obscure when loop effects are important. In this talk, I will discuss the impacts of loop contributions to the interpretation of...
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Michael Ramsey-Musolf (TDLI-SJTU)21/12/2025, 08:15
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Yue-Lin Sming Tsai (Purple Mountain Observatory)21/12/2025, 08:45
We explore the surviving parameter space for sub-GeV thermal Dark Matter (DM) within Higgs-portal models, analyzing both a minimal Majorana DM scenario with a singlet scalar mediator and leptophilic DM scenarios. These light DM candidates face severe constraints from the observed relic density, Cosmic Microwave Background (CMB) measurements, and direct detection experiments. Our comprehensive...
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Shao-Jiang Wang (Institute of Theoretical Physics, Chinese Academy of Sciences)21/12/2025, 09:15
I will introduce cosmological and gravitational-wave aspects of phase-transition phenomenology, including bubble nucleation and expansion dynamics, gravitational-wave generations, curvature perturbations, primordial black holes, and, in particular, the induced gravitational waves from primordial gravitational collapse at non-linear and non-perturbative levels.
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Ye-Ling Zhou (HIAS-UCAS)21/12/2025, 09:45
Domain walls (DWs) are topological defects arising from spontaneous breaking of discrete symmetries. The DW property is determined by both the symmetry and potential of the new Higgs which triggers the symmetry breaking. While most phenomenological studies on GWs from DWs focus on those from Z2 breaking, I will extend to those beyond Z2. The latter are widely predicted in, e.g., flavour...
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Chengcheng Han (Sun Yat-sen university)21/12/2025, 10:30
Higgs field in cosmology
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Wei Chao (BNU)21/12/2025, 11:00
In this talk, I will present the physics induced by the electroweak symmetry non-restoration (ESNR) in the early universe. I will show that ESNR may trigger SU(3)_C symmetry breaking and restoration. In addition, ESNR can also trigger the Leptogenesis without requiring any B-L violation.
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Hao Zhang (Theoretical Physics Division, Institute of High Energy Physics, Chinese Academy of Sciences)21/12/2025, 11:30
In this talk, we will discuss the potential of investigating quantum entanglement effects at Higgs factory.
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Prof. Bin Yan (IHEP)21/12/2025, 12:00
Directly probing light-quark Yukawa couplings and their flavor structure remains a major challenge due to their smallness and overwhelming QCD backgrounds. In this Letter, we propose a theoretical framework to access these couplings at future lepton colliders through transverse spin dependent azimuthal modulations in dihadron fragmentation.
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These modulations arise from the interference... -
Zeren Simon (泽人) Wang (王) (Hefei University of Technology)21/12/2025, 14:00
Long-lived particles (LLPs) originating from decays of Standard-Model-like or beyond-the-Standard-Model Higgs bosons are often featured with signatures of displaced vertices (DVs) and jets at colliders. In this work, we show that a recent ATLAS search for DVs plus jets, with its recast implementation, can efficiently place bounds on such hadronically or semileptonically decaying LLPs. In...
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Ruiwen Ouyang (HIAS, UCAS)21/12/2025, 14:00
We present a supersymmetric Pati-Salam model with small representations as a potential candidate for physics beyond the Standard Model. The model features a Higgs sector with bifundamental fields $H_R+\bar H_R=(4,1,2)+(\bar 4,1,2)$, $H_L+\bar H_L=(4,2,1)+(\bar 4,2,1)$ as well as a pair of bi-doublet fields $h_a=(1,2,2)$ where $ a=1,2$, with three families of fermions accommodated in $...
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Qing Chen (Anhui University of Science and Technology)21/12/2025, 14:00
We derive a set of linear UV unitarity conditions that go beyond positivity and are easy to implement in an optimization scheme with dispersion relations in a multi-field EFT. We apply it to Higgs self scattering and compare the newly obtained upper bounds with the traditional perturbative unitarity bounds from within the EFT, and discuss some phenomenological implications of the two-sided...
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Mohamed Younes Sassi (TDLI, Shanghai Jiao Tong University)21/12/2025, 14:20
The Next-to-Two-Higgs-Doublet model (N2HDM) has a rich vacuum structure where multiple electroweak (EW) breaking minima, as well as CP and electric-charge breaking minima, can coexist. These minima can be deeper than the electroweak vacuum $v_{𝑒𝑤} \approx 246$ GeV of our universe, making our vacuum metastable. In such a case, one needs to calculate the tunneling rate from the EW vacuum to the...
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铭滔 张 (北京大学)21/12/2025, 14:20
This talk presents the latest results from the CMS experiment on rare and exotic decays of the Higgs boson, which serve as crucial portals to physics beyond the Standard Model (BSM). Key highlights include the first evidence of the H→μμ decay, probing the second-generation Yukawa coupling, and the H→Zγ decay, with a combined significance of 3.4σ. Searches for H→cc̅, decays to mesons, invisible...
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仁晖 覃 (重庆大学)21/12/2025, 14:20
我们将在报告中讨论有限温度场论在电弱相变研究中的规范依赖性。
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Baihong Zhou (Tsung-Dao Lee Institute, Shanghai Jiao Tong Univ. (CN))21/12/2025, 14:40
Ref. ATLAS-CONF-2025-012
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This note presents a combination of searches for Higgs boson pair (HH) production performed by the ATLAS and CMS Collaborations using proton-proton collision data sets recorded at $\sqrt{s}$ = 13 TeV at the LHC Run 2, corresponding to integrated luminosities ranging between 126 and 140 fb$^{-1}$. The upper limit at the 95% confidence level on the total HH production... -
Yaoduo Wang (TDLI)21/12/2025, 14:40
We investigate a cosmological scenario in which the Peccei-Quinn (PQ) symmetry remains broken in the entire history of the Universe, thereby avoiding the formation of axion strings and domain walls. Contrary to the conventional expectation, it is demonstrated that appropriately chosen scalar interactions are able to keep the PQ symmetry broken at arbitrarily high temperatures. We carefully...
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海洋 王 (重庆大学)21/12/2025, 14:40
We propose a novel approach to calculate the false vacuum decay rate, which goes beyond the saddle-point approximation when large thermal fluctuations appear. Utilizing the extension of the Wigner function in quantum field theory, we numerically calculate the decay rate of the false vacuum through functional integral. We observe that the decay rate for the thermal fluctuation scenarios and its...
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Zi-Qiang Chen (UCAS,HIAS)21/12/2025, 15:00
We propose a parametrization of neutrino masses and mixing in the minimal seesaw model (MSM). The MSM, which introduces two heavy sterile neutrinos, is the minimal extension of the Standard Model in addressing the tiny masses of active neutrinos. The parametrization includes 11 free parameters: 6 neutrino oscillation parameters (2 mass-squared differences $\Delta m^2_{21}$, $\Delta m^2_{31}$,...
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Ehsan Musajan (University of Science and Technology of China)21/12/2025, 15:00
Recent measurements of single top-Higgs (tH) production at the LHC show consistent excesses above Standard Model predictions across multiple decay channels. While still statistically limited, these observations are intriguing given tH's unique sensitivity to the relative sign between top Yukawa and W boson couplings. This talk summarizes the current experimental landscape, and ongoing...
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Zhihao Zhang (TDLI)21/12/2025, 15:00
We investigate a framework of the Minimal Supersymmetric Standard Model
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(MSSM) in which the quark and lepton flavor structure and suppression of flavor-
changing neutral currents (FCNCs) are governed by non-invertible selection rules.
By implementing such non-group-like fusion rules for matter fields, arising from
gauging the outer automorphism Z2 of a discrete ZN symmetry, we obtain... -
Congqiao Li (Peking University)21/12/2025, 15:20
I will present a new jet-free strategy for the $HH \to 4b$ search at the LHC that enhances sensitivity by more than a factor of five compared with current approaches. The method uses all-particle inputs to jointly identify $h_1 h_2 \to 4b$ across variable Higgs-candidate masses and to estimate $(m_{h_1}, m_{h_2})$ via a mass-decorrelated multiclass classifier. A key feature is that the $HH$...
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Fangchao Liu (TDLI, SJTU)21/12/2025, 15:20
The strong CP problem remains one of the most important unresolved issues in the Standard Model. Spontaneous CP violation (SCPV) is a promising approach to the problem by assuming that CP is an exact symmetry of the Lagrangian but broken spontaneously at the vacuum, which enables the generation of the observed Cabibbo-Kobayashi-Maskawa (CKM) phase without reintroducing a nonzero strong CP...
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Gao-Xiang Fang (HIAS, UCAS, Hangzhou)21/12/2025, 15:20
GUTs unify quarks and leptons into same representations and predict correlations between their masses and mixing. We take new data of JUNO and perform numerical scans to explore the flavor space compatible with data in SO(10) GUTs. The quark-lepton correlation shows the preference of normal ordering for light neutrino masses, predicts favored region of the CP-violating phase in neutrino...
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吴 静儿 (中国科学院大学物理科学学院)21/12/2025, 15:40
The origin of the Higgs boson ($H_{125}$), discovered in 2012, remains a mystery. In the metric affine theory (MAT) framework, we study the scalar potential and investigate a couple of scenarios for the symmetry breaking mechanisms with a dilaton model which is derived from the geometry. The LHC constraints for the couplings of Yukawa couplings, Higgs-weak vector bosons and Higgs...
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占鹏 侯 (华中师范大学)21/12/2025, 15:40
Although the Standard Model has achieved remarkable success, its limitations motivate physicists to continuously explore new fundamental particle theories. Among the numerous candidate theories, Grand Unified Theories (GUTs) have attracted significant attention due to their simplicity and potential to unify the three fundamental interactions.
We present a detailed study of the running of...
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Bei Liu (Sun Yat-Sen University)21/12/2025, 15:40
CP4 3HDM is a three-Higgs-doublet model based on the CP symmetry of order 4 (CP4) without any accidental symmetries. When exploring the scalar and Yukawa sector phenomenon of this model, the usual scan procedure is computationally time-consuming and inefficient. A much better scanning procedure, which we call the inversion, is to identify a set of crucial physical observables, to use them as...
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Prof. Igor Ivanov (Sun Yat-sen University)21/12/2025, 16:20
The hot early Universe must have evolved through phase transitions around the electroweak epoch. In multi-Higgs models, this evolution could be much more intricate than a single-step EWPT. In this talk, I will discuss a peculiar regime in the two-Higgs-doublet model, in which thermal evolution of the early Universe passes through an intermediate phase with a charge-breaking vacuum. Remarkably,...
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Yuichiro Nakai21/12/2025, 16:50
We discuss the intriguing possibility that the recently reported nano-Hz gravitational wave signal by Pulsar Timing Array (PTA) experiments is sourced by a strong first-order phase transition in a dark sector. The phase transition has to be strongly supercooled to explain the signal amplitude. However, such strong supercooling exponentially dilutes away any pre-existing baryon asymmetry and...
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Yun Jiang21/12/2025, 17:20
Cosmological phase transitions played a crucial role in shaping the early universe. This talk explores non-standard first-order transitions with extremely low nucleation rates, highlighting two novel possibilities: transitions completing with super-Hubble bubble separation, and bubble-free transitions driven by collapsing domain-wall structures. These scenarios lead to distinctive cosmological...
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Ehsan Musajan (University of Science and Technology of China)
ATLAS and CMS experiments have confirmed Higgs boson’s role in giving mass to the weak bosons and 3rd generation charged fermions. However, whether the other generations of fermions acquire mass through the same mechanism remains an open question. The Higgs boson’s decay to a pair of muons provides a direct probe of its Yukawa coupling to second-generation fermions. In this talk, I will...
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