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2nd Topics of Particle, Astro and Cosmo Frontiers (TOPAC 2024)

30 May 2024 to 2 June 2024
Southeast University (Sipailou Campus)
Asia/Shanghai timezone

Contribution List

79 out of 79 displayed
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  1. 68. Charm Physics at BES III
    Haibo Li
    31/05/2024, 08:30
  2. 84. Recent results from Belle II
    Sen Jia
    31/05/2024, 08:55
  3. 85. SRF Cavity Searches for Dark Photon Dark Matter
    Jing Shu
    31/05/2024, 09:20
  4. 86. BSM physics at ATLAS
    Prof. Lei Zhang (Nanjing University (CN))
    31/05/2024, 09:45
  5. 87. Dynamic Universe: A FAST Perspective
    DI LI (National Astronomical Observatories, CAS)
    31/05/2024, 10:45
  6. 88. Binary Neutron Stars: Electromagnetic and Gravitational Wave Binaries, and Kilonovae
    Youjun Lu
    31/05/2024, 11:10
  7. 29. Detecting Elastic Coherent Neutrino Scattering with RELICS Experiment
    Shengchao Li (西湖大学 Westlake University)
    31/05/2024, 11:35
    Oral talk
    Astrophysics

    The Coherent Elastic Neutrino-Nucleus Scattering (CEvNS) was predicted in 1974 but wasn't experimentally confirmed until 2017 due to its extremely low energy deposit, making detection challenging due to energy threshold and background levels. Liquid Xenon Time Projection Chambers (LXeTPCs) have shown excellence in dark matter searches and may serve as an ideal technology for detecting CEvNS....

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  8. 60. Constraining Bosonic Dark Matter-Baryon Interactions from Neutron Star Collapse
    Dr Arvind Kumar Mishra (Nanjing Normal University, Nanjing, China)
    31/05/2024, 13:30
    Oral talk
    Astrophysics

    Dark matter (DM) may be captured around a neutron star (NS) through DM-nucleon interactions. We observe that the enhancement of such capturing is particularly significant when DM-nucleon scattering cross-section depends on the relative velocity and/or momentum transfer. This increment could potentially lead to the formation of a black hole within the typical lifetime of the NS. As the black...

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  9. 6. Dark photon effects with the kinetic and mass mixing in Z boson decay processes
    Jin Sun (Institute for Basic Science (IBS))
    31/05/2024, 13:30

    Motivated by the most recent measurement of tau polarization in $Z\to \tau^+\tau^-$ by CMS, we have introduced a new $U(1)_X$ gauge boson field X, which can have renormalizable kinetic mixing with the standard model $U(1)_Y$ gauge boson field Y.
    In addition to the kinetic mixing of the dark photon, denoted as $\sigma$, there may also be mass mixing introduced by the additional Higgs doublet...

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  10. 70. Imprints of Dissipative Effects in Phase Transition Gravitational Waves
    Huai-Ke Guo
    31/05/2024, 13:55
  11. 65. long-lived particle search
    Wei Su (SYSU)
    31/05/2024, 13:55
    Oral talk
    Higgs

    The ForwArd Search ExpeRiment (FASER,), is a recently installed detector at the LHC that can detect light, long lived particles. In this work we study the prospect of detecting light CP-even and CP-odd scalars at the FASER. We develop the general formalism for the scalar production and decay from mesons at LHC, given modified couplings of the scalars to the SM particles, as well as...

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  12. 22. GKZ hypergeometric systems of four-loop vacuum Feynman integrals
    Prof. Hai-Bin Zhang (Hebei University)
    31/05/2024, 14:20
    Oral talk
    Higgs

    We present GKZ hypergeometric systems of four-loop vacuum Feynman integrals.

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  13. 59. Gravitational waves from the sound of first-order phase transition
    Dr Xiao Wang (Monash University)
    31/05/2024, 14:20
    Oral talk
    Astrophysics

    Phase transition gravitational waves could be a novel probe for fundamental physics in the near future. Hence, precise calculation of phase transition gravitational waves is essential to revealing many unresolved puzzles in our universe. I will discuss a framework that could allow us to omit some unnecessary approximations and give a relatively more accurate calculation of gravitational waves...

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  14. 19. Higgs properties and new physics beyond the SM
    Prof. Bin Yan (IHEP)
    31/05/2024, 14:45

    The discovery of the Higgs boson at the Large Hadron Collider (LHC) has opened a new era in particle physics.
    Precise measurements of the properties of the Higgs boson are crucial for addressing several fundamental questions
    in the field. These include understanding the mechanism behind electroweak symmetry breaking,
    unraveling the origin of particle masses, and exploring potential...

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  15. 76. Light Thermal Dark Matter Beyond p-Wave Annihilation in Minimal Higgs Portal Model
    Yue-Lin Sming Tsai (Purple Mountain Observatory)
    31/05/2024, 14:45
    Oral talk
    Astrophysics
  16. 8. Predictions of m_ee and neutrino mass from a consistent Froggatt-Nielsen model
    Prof. Jin-Wei Wang (UESTC)
    31/05/2024, 15:30
    Oral talk
    Neutrino

    The seesaw mechanism is the most attractive mechanism to explain the small neutrino masses, which predicts the neutrinoless double beta decay (0νββ) of the nucleus. Thus the discovery of 0νββ is extremely important for future particle physics. However, the present data on the neutrino oscillation is not sufficient to predict the value of $m_{ee}$ as well as the neutrino mass $m^i_ν$. In this...

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  17. 3. Recent ATLAS results of Dark Matter and Dark Photon combinations and Dark Higgs searches
    Shu Li (TDLI, SJTU)
    31/05/2024, 15:30

    Ref: https://arxiv.org/abs/2306.00641

    Results from a wide range of searches targeting different experimental signatures with and without missing transverse momentum ($E^{miss}_T$) are used to constrain a Two-Higgs-Doublet Model (2HDM) with an additional pseudo-scalar mediating the interaction between ordinary and dark matter (2HDM+a). The analyses use up to 139 fb$^{−1}$ of proton-proton...

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  18. 69. Joint Study of Anomalous Magnetic Moment of Muon and Mechanism of Neutrino Mass Generation
    Pei-Wen Wu
    31/05/2024, 15:55
  19. 56. New physics probed with off-Z-pole data
    Zhuoni Qian (Hangzhou Normal University)
    31/05/2024, 15:55
    Oral talk
    Experiments

    We fully explore the prospect of using the off $Z$-pole run at
    future lepton colliders to probe the new physics (NP) beyond the Standard Model (SM) via dimension-6 four-fermion effective operators. With interference between the dimesion-6 operator and SM diagram contributions to the $e^+ e^- \rightarrow f \bar f$ scattering processes, the NP effects shows up at collision energy
    off of the...

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  20. 42. Search for T-odd mechanisms beyond the standard model in transversely polarized pe⃗ elastic scattering?
    Boxing Gou (IMP, CAS)
    31/05/2024, 16:20
    Oral talk
    Experiments

    Within the standard model, transverse single spin asymmetries in electron elastic scatterings can only arise from multi-photon exchanges. The A4@MAMI collaboration has measured the beam transverse single spin asymmetry in electron-proton elastic scattering from 315 to 1508 MeV (Phys. Rev. Lett. 124, 122003 (2020)). The data are significantly different from theoretical calculations based on...

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  21. 57. SMEFT vs HEFT in the case of type-II seesaw
    Yoshiki Uchida (South China Normal University)
    31/05/2024, 16:20
    Oral talk
    Neutrino

    The representative effective field theories(EFTs) written in terms of Standard Model particles are Standard Model EFT(SMEFT) and Higgs EFT(HEFT). When we integrate out the heavy particles in the UV theory before electroweak symmetry breaking, it results in the SMEFT. On the other hand, if we integrate out the heavy particles taking into account the mass mixing in the symmetry-breaking phase,...

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  22. 24. Aiming for Tops of ALPs with a Muon Collider
    Yufei Zhang
    31/05/2024, 17:30

    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...

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  23. 41. Axion star condensation around primordial black holes and microlensing limits
    孜文 尹 (上海交通大学物理与天文学院（李政道研究所）)
    31/05/2024, 17:35

    Dark matter is one of the biggest mysteries in physics and astronomy today. While multiple dark matter candidates have been proposed, such as the axion and primordial black holes (PBHs), the interplay between them is not well understood. In this talk, I will focus on the formation of axion minihalos around PBHs and the condensation of axion stars inside them, and reveal distinct morphological...

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  24. 45. Future targets for light gauge bosons from cosmic strings
    Hanyu Cheng (Tsung-Dao Lee Institute & SJTU)
    31/05/2024, 17:40

    Cosmic strings, theoretical one-dimensional topological defects from the early universe, are a compelling source for studying dark matter production and gravitational wave (GW) emission. In this talk, I will focus on the production of gauge bosons and GW emission resulting from the decay of cosmic strings, discussing the constraints imposed by cosmological considerations. Specifically, I will...

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  25. 39. Wide Binary Evaporation by Dark Solitons
    Zihang Wang (Institute of High Energy Physics)
    31/05/2024, 17:45

    We perform an analytic calculation of binary star evaporation rate under the gravitational potential from spatially extended dark solitons, and demonstrate that Milky Way’s wide binary star systems are susceptible to tidal perturbations from dark matter solitons of comparable and larger sizes. The GAIA data shows a sharp decrease of halo-like wide binaries at large separations, indicating...

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  26. 17. The SM expected branching ratio for h→γγ and an excess for h→Zγ
    Zhonglv Huang (TDLI)
    31/05/2024, 17:50

    Combination of recent measurements for $h \to Z \gamma$ from ALTLAS and CMS shows an excess that the ratio of the observed and standard model (SM) predicted branching ratios $\mu = (\sigma\cdot{\cal B})_{\mathrm{obs}}/(\sigma\cdot{\cal B})_{\mathrm{SM}}$ is $2.2\pm 0.7$. If confirmed, it is a signal of new physics (NP) beyond SM. We study NP explanation for this excess. In general, for a...

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  27. 20. The neutral scalars of 2HDM+S model under the LHC
    Cheng Li (Sun-Yat-Sen University)
    31/05/2024, 17:55

    The 2HDM+S is the singlet extension of 2HDM, which can accommodate more physics potential beyond the SM. We summarize the type II 2HDM+S model with various Higgs potential structures, and discuss several scenarios with different mass hierarchy. In this study, we concentrate on the mass eigenstate of the 2HDM+S, and test the parameter space of Higgs mixing angles and masses against the...

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  28. 25. Detecting Quadratically Coupled Ultra-light Dark Matter with Stimulated Annihilation
    Yuanlin Gong (Nanjing Normal University)
    31/05/2024, 18:00

    Ultra-light Dark Matter (ULDM) is one of the most promising DM candidates. Due to the Bose
    enhancement, we find the annihilation rate of the ULDM in the presence of background photon
    radiation can be greatly enhanced and produce a distinctive reflected electromagnetic wave with an
    angular frequency equal to the ULDM mass. We propose to utilize such stimulated annihilation
    to probe the ULDM...

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  29. 103. The revelation of the nature of the inertial force and its physical impacts
    Chiyi Chen
    31/05/2024, 18:05
  30. 1. Prospects for testing gravity with pulsars around Sagittarius A*
    Zexin Hu (Peking University)
    31/05/2024, 18:10

    Future observation with next-generation large-area radio telescopes are expected to discover radio pulsars closely orbiting around Sagittarius A (Sgr A), the supermassive black hole (SMBH) in our Galactic Center (GC). Such a system can provide a unique laboratory for testing gravity theories , as well as the astrophysics around the GC. We will introduce our recent studies about prospects for...

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  31. 28. Dynamic instability analysis for bumblebee black holes: the odd parity
    ZHANFENG MAI (Kavli Institute for Astronomy and Astrophysics， Peking University)
    31/05/2024, 18:15

    Spherical black-hole (BH) solutions have been found in the bumblebee gravity where a vector field nonminimally couples to the Ricci tensor. We study dynamic (in)stability associated with the gravitational and vector perturbations of odd parity against these bumblebee BHs. Under the plane-wave approximation, we find that bumblebee BHs do not suffer ghost instability, but gradient instability...

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  32. 74. Illuminating Black Hole Shadow with Annihilating Dark Matter
    Yuxin Liu
    31/05/2024, 18:20
  33. 47. Weak Lensing Constraints on Dark Matter-Baryon Interactions with N-Body Simulations and Machine Learning
    弛 张 (中国科学院紫金山天文台)
    31/05/2024, 18:25

    We investigate the elastic scattering cross section between dark matter and protons using the DES Year 3 weak lensing data. This scattering induces a dark acoustic oscillation structure in the matter power spectra. To address non-linear effects at low redshift, we utilize principal component analysis alongside a limited set of N-body simulations, improving the reliability of our matter power...

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  34. 66. Degeneracy Enhancement of Neutron-Antineutron Oscillation in Neutron Star
    Qiheng Wang, Xuanye Fu (Shanghai Jiao Tong University), Ziyang Guo
    31/05/2024, 18:30

    We explore the theoretical description of oscillations in degenerate cases, presenting the formula for oscillation probability with neutrino oscillation as an illustrative example. We then apply the degenerate oscillation theory to study neutron-antineutron oscillations, calculating the constraints of the new model on oscillation parameters, such as mixing angles, in neutron stars. Our...

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  35. 49. Searching for heavy neutral lepton and LNV through VBS at muon colliders
    Dr Man Yuan (Nankai University)
    31/05/2024, 18:35

    High-energy muon collider can play as an emitter of electroweak gauge bosons and thus leads to substantial vector boson scattering (VBS) processes. In this work, we investigate the production of heavy neutral lepton (HNL) $N$ and lepton number violation (LNV) signature through VBS at high-energy muon colliders. They provide clean and robust LNV signatures to tell the nature of Majorana HNLs...

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  36. 50. Neutron star cooling with lepton-flavor-violating axions
    Hong-Yi Zhang
    31/05/2024, 18:40

    The cores of dense stars are a powerful laboratory for studying feebly-coupled particles such as axions. Some of the strongest constraints on axionlike particles and their couplings to ordinary matter derive from considerations of stellar axion emission. In this work we study the radiation of axionlike particles from degenerate neutron star matter via a lepton-flavor-violating coupling that...

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  37. 51. A mechanism relating the fermionic mass hierarchy to the flavor mixing
    jinlei yang (Hebei University)
    31/05/2024, 18:45

    Considering the hierarchical structure of fermionic masses and the fermionic flavor mixing puzzles in the Standard Model, we propose to relate them by the see-saw mechanism, i.e. only the third generation of quarks and charged leptons achieve the masses at the tree level, the first two generations achieves masses through the mixings with the third generation, and the neutrinos achieve tiny...

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  38. 75. Spontaneous CP violation in Supersymmetric QCD
    耀铎 王
    31/05/2024, 18:50
  39. 54. The electroweak magnetic monopole in the presence of KSVZ axion
    Rui-jia Zhang (Nankai University)
    31/05/2024, 18:55

    The Witten effect implies the dynamics of axion and magnetic monopole. The Cho-Maison monopole is a realistic electroweak monopole arisen in the Weinberg-Salam theory. This monopole of TeV scale mass motivates the dedicated search for electroweak monopole at colliders. In this work we investigate the implication of KSVZ axion to the electroweak magnetic monopole. We use the spherically...

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  40. 55. Cosmologically Consistent Analysis of Gravitational Waves from Hidden Sectors under Synchronous Thermal Evolution
    Jinzheng Li (Northeastern University (Boston))
    31/05/2024, 19:00

    In this talk, we will discuss production of gravitational waves in the early universe within a first order phase transition involving a hidden sector feebly coupled with the visible sector. Unlike most existing studies on GWs from hidden sectors, which assume a constant temperature ratio between the hidden and visible sectors (i.e., ξ=T_h/T=const), we adopt a more precise approach using...

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  41. 61. Dark matter search results in PandaX-4T experiment
    帅杰 李 (Yalong Hydro)
    01/06/2024, 08:30
    Oral talk
    DM

    PandaX-4T experiment is a dark matter direct detection experiment that employs a dual-phase time projection chamber with a sensitive volume containing 3.7 tonnes of liquid xenon. Since 2020, the PandaX-4T experiment has finished the data taking of run0 and run1 which has been used to test several dark matter models. In this talk, we will discuss the latest dark matter search results of the...

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  42. 43. Levitodynamics with multi-stochastic forces and the simple applications on the dark matter detection
    Wenyu Wang (Beijing University of Technology)
    01/06/2024, 08:55
    Oral talk
    DM

    If the terrestrial environment is permeated by dark matter, the levitation experiences damping forces and fluctuations attributed to dark matter. This paper investigates levitodynamics with multiple stochastic forces, including thermal drag, photon recoil, feedback, etc., assuming that all of these forces adhere to the fluctuation-dissipation theorem. The ratio of total damping to the...

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  43. 90. Hunting for wimps and beyond
    Lei Wu
    01/06/2024, 09:20
    DM
  44. 91. Axion-like particle triggered baryogenesis
    Wei Chao
    01/06/2024, 09:45
    DM
  45. 38. Double-Weak Decays in the PandaX-4T Experiment
    Prof. 少博 王 (Shanghai Jiao Tong University)
    01/06/2024, 10:30

    The possible Majorana nature of Neutrino is crucial for addressing profound questions such as the conservation of lepton number and the origins of the matter-antimatter asymmetry in the universe. Experimentally searching for Majorana neutrinos is one of the most important fields in the forefront of fundamental physics. The PandaX-4T detector, located in the China Jinping Underground Laboratory...

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  46. 40. Towards a systematic study of non-thermal leptogenesis from inflaton decays
    Xinyi Zhang (Hebei University)
    01/06/2024, 10:55
    Oral talk
    Neutrino

    We investigates non-thermal leptogenesis from inflaton decays in the minimal extension of the canonical type-I seesaw model, where a complex singlet scalar $\phi$ is introduced to generate the Majorana masses of right-handed neutrinos (RHNs) and to play the role of inflaton. We systematically study non-thermal leptogenesis with the least model dependence. We give a general classification of...

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  47. 92. Neutrinoless double beta decay in seesaw models
    Yufeng Li
    01/06/2024, 11:20
  48. 93. The origin of pseudo-Nabmu-Goldstone-Boson Dark Matter
    Koji Tsumura
    01/06/2024, 11:45
  49. 21. Quantum Theory of Dark Matter Scattering
    Takumi Kuwahara (Peking U)
    01/06/2024, 13:30
    DM

    Dark matter self-scattering is one of key ingredients for small-scale structure of the Universe, while dark matter annihilation is important for the indirect measurements. There is a strong correlation between the velocity-dependent self-scattering cross section and the Sommerfeld enhancement factor for the dark matter annihilation cross section. In this study, we formulate a direct relation...

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  50. 12. Revisiting the fermion-field non-topological solitons and primordial black holes
    Prof. Ke-Pan Xie (Beihang University)
    01/06/2024, 13:30
    Oral talk
    GW

    -

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  51. 26. A new first-order QCD phase transition in the early universe and gravitational waves
    Sichun Sun (Beijing Institute of Technology)
    01/06/2024, 13:55
    GW

    We discuss possible ways of extending the Standard Model quantum chromodynamics theory (QCD) theory and realize a first-order phase transition at high temperatures above 1 GeV without running into current constraints from both heavy ion colliders and early cosmology. The phase transition is from a non-perturbative effect of the QCD and can have a great impact on the early universe, including...

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  52. 15. Freeze-in Dark Matter Explanation of the Galactic 511~keV Signal
    Wan-Zhe Feng (Tianjin University)
    01/06/2024, 13:55
    Oral talk
    DM

    We demonstrate, for the first time, the freeze-in dark matter, constituting 100% of the relic density can completely explain the Galactic 511 keV photon signal. In the talk, I will present two simple models for illustration. In both scenarios, the freeze-in mechanism generates the entire dark matter relic density, and thus any types of additional dark matter components produced from other...

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  53. 13. Graviton-photon conversion in atomic electric fields and high frequency gravitational wave detections
    Gui-Rong Liang (China University of Mining and Technology)
    01/06/2024, 14:20
    Oral talk
    GW

    We study graviton-photon conversion in potential ground-based experiments. From graviton to photon transition, we calculate the cross section of graviton-atom interaction in the presence of spherical atomic electric fields; the obtained results hold for graviton energy around 100 keV to 1 GeV, and would be enhanced along the coherent length in extremely high frequencies; thus it gives a chance...

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  54. 34. Probe Strongly Coupled Dark Sector via Gravitational Wave
    Zhi-Wei Wang (UESTC)
    01/06/2024, 14:20
    DM

    We go beyond the state-of-the-art by combining first principal lattice results and effective field theory approaches as Polyakov Loop model to explore the non-perturbative dark deconfinement-confinement phase transition and the generation of gravitational-waves in a dark Yang-Mills theory. We further include fermions with different representations in the dark sector. Employing the...

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  55. 77. Detecting a Fifth-Force Gauge Boson via Superconducting Josephson Junctions
    Yu Cheng
    01/06/2024, 14:45
    DM
  56. 81. Discovering axions at muon experiments
    Lorenzo Calibbi
    01/06/2024, 15:30
  57. 35. 暗SU(2)下的矢量玻色子暗物质模型的一些较为一般的讨论
    Yi-Lei Tang (中山大学)
    01/06/2024, 15:30
    DM

    本报告将讨论SU(2)矢量暗物质模型中拉矢量的一般构造方式，最终保证暗物质稳定性离散群的一般破缺方式，以及标量粒子的简并模式。

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  58. 10. Multi-messenger probes on dark matter surrounding black holes
    kenji kadota
    01/06/2024, 15:55
    Oral talk
    DM

    The environment around the black hole can provide us with a promising playground to study the dark matter properties because of the large dark matter density from accretion.

    I will explore the multi-messenger probes on the dark matter in the vicinity of black holes. More concretely, I will discuss (1) the multi-wavelength signals covering the radio, CMB and gamma rays which can arise from...

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  59. 82. Probing lepton flavour violating ALPs at \mu^+\mu^+ and \mu^+ e^- colliders
    Lopamudra Mukherjee
    01/06/2024, 15:55
  60. 78. A systematic investigation on dark matter-electron scattering in effective field theories
    Jin-Han Liang
    01/06/2024, 16:20
    DM
  61. 83. Exploring interference effects between two ALP effective operators at the LHC
    Dr Chih-Ting Lu (Nanjing Normal University)
    01/06/2024, 16:20
  62. 94. Jet origin identification at CEPC
    Manqi RUAN (Institute of High Energy Physics, Beijing, China)
    02/06/2024, 08:30
  63. 95. Outlook for Muon g-2 measurement
    Prof. Liang Li (Shanghai Jiao Tong University)
    02/06/2024, 08:55
  64. 27. QCD axion dark matter and the cosmic dipole problem
    Chengcheng Han (Sun Yat-sen university)
    02/06/2024, 09:20

    TBD

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  65. 97. New perspective of chiral symmetry
    Han-Qing Zheng
    02/06/2024, 09:45
  66. 2. Recent progress of Dark SHINE R&D
    Kun Liu (TDLI / SJTU)
    02/06/2024, 10:30

    Dark SHINE is a newly proposed fixed-target experiment at SHINE (Shanghai high repetition rate XFEL and extreme light facility, being the 1st hard X-ray FEL in China) under construction targeting completion in 2026. Dark SHINE aims to search for the new mediator, Dark Photon, bridging the Dark sector and the ordinary matter. In this work and presentation, we present the idea of this new...

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  67. 32. Testing ultralight scalar field dark matter in high-redshift universe
    Bohua Li (Guangxi University)
    02/06/2024, 10:30
    Oral talk
    Astrophysics

    Scalar field dark matter (SFDM) comprised of ultralight (m ∼ $10^{−22}$ eV) bosonic particles has received significant attention as a viable alternative to Cold Dark Matter (CDM), as it approximates CDM on large scales (≳ 1 Mpc) while potentially resolving some of its small-scale problems via kpc-scale quantum interference. However, the basic SFDM model described by a free real field, a.k.a....

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  68. 44. Baryon overproduction constraints on the lepton flavor asymmetry in the early Universe
    Kohei Kamada (HIAS UCAS)
    02/06/2024, 10:55
    Oral talk
    Astrophysics

    Anomalous transport phenomena, such as the chiral magnetic effect, are originated from the chiral anomaly of gauge theories and recently developed in hadron and condensed matter physics. They can also cause interesting phenomena in the early Universe when the chirality is a good conserved quantity at the temperature much higher than 100 TeV. An example is the chiral plasma instability, where...

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  69. 36. Recent $B^+ \to K^+ \nu \bar\nu$ excess at Belle II, (dark) SMEFT, and flavour structure
    袁 兴博
    02/06/2024, 10:55

    Recently, the Belle II collaboration announced the first measurement of $\mathcal B(B^+\to K^+\nu\bar\nu)$, which is found to be about $2.7\sigma$ higher than the SM prediction. We decipher the data with two new physics scenarios: the underlying $b\to s \nu\bar\nu$ transition is, besides the SM contribution, further affected by heavy new mediators that are much heavier than the EW scale, or...

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  70. 30. On the SM quark/lepton masses in an SU(8) theory
    ning chen (Nankai University)
    02/06/2024, 11:20

    We describe the SM quark/lepton masses in an SU(8) theory, where three-generational SM fermions are non-trivially embedded. A set of d=5 operators that break the emergent global symmetries in the chiral fermion sector due to the Planck scale effects are sufficient to generate the light SM quark/lepton masses as well as the CKM mixing pattern, with one single SM Higgs doublet in the spectrum.

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  71. 52. Primordial black holes from slow phase transitions: a model-building perspective
    Masanori Tanaka (Peking University)
    02/06/2024, 11:20
    Oral talk
    Astrophysics

    We discuss the relation between the Higgs potential structure and primordial black hole (PBH) formations. Recently, it has been discussed that PBHs can be formed by first-order phase transitions at the early Universe. In this talk, we consider the PBH formation mechanism through delayed first-order phase transitions at the early Universe. If the phase transition is delayed, the large energy...

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  72. 33. $B$ meson anomalies and large $B^{+}\to K^{+}\nu\bar{\nu}$ in non-universal $U(1)^\prime$ models
    CRISTIAN FELIPE SIERRA FONSECA (Nanjing Normal University)
    02/06/2024, 11:45
    Oral talk
    Flavor

    In view of both the latest LHCb measurement of $R_{K^{(*)}}$ and the new $2.7\sigma$ 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,...

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  73. 5. Cosmological phase transitions in the Holographic models for the composite Higgs boson
    Oleg Novikov (Saint-Petersburg University)
    02/06/2024, 11:45
    Oral talk
    Astrophysics

    The composite Higgs boson scenario assumes the existence of a new strongly coupled gauge sector with a softly broken approximate hyperflavor symmetry. At low energies the corresponding dynamics may be studied with help of the holographic techniques inspired by AdS/QCD. We present the bottom-up soft-wall holographic model that admits a first-order phase transition and, using a perturbation...

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  74. 46. Extreme mass ratio inspirals in evolving nuclear star clusters
    Fupeng Zhang
    02/06/2024, 13:30
    Oral talk
    Astrophysics

    Recently we have build a Monte-Carlo method that can obtain self-consistent solutions of an evolving nuclear star cluster that contains a central massive black hole. Our method evolves the orbits of stellar objects by solving two-dimensional (energy and angular momentum) Fokker-Planck equations given multiple mass components. In this study we apply our method to investigate the evolution of...

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  75. 98. 12m kHz GW detector prototype at Beijing Normal University
    Mengyao Wang
    02/06/2024, 13:55
  76. 99. Probing ultralight particles with gravitational waves
    Huan Yang
    02/06/2024, 14:20
  77. 100. CPTA current status and future expectation
    Heng Xu
    02/06/2024, 15:15
  78. 101. Searching for Ultralight New Particles with Spin-Polarized Systems
    Wei Ji
    02/06/2024, 15:40
  79. 18. Recent Status and Results of the Dark Matter Particle Explorer
    Lei Feng (中国科学院紫金山天文台)
    02/06/2024, 16:05
    Oral talk
    Astrophysics

    DAMPE是一颗空间宇宙线探测器，于2015年12月成功发射，并在轨运行多年，已经取得多项科学成果。DAMPE主要的科学目标有暗物质间接探测、宇宙线物理和高能伽马射线天文学。本报告重点介绍DAMPE的探测器研制，合作组组成和在轨运行情况。并介绍DAMPE已取得的科学成果，以及数据的物理解读。

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