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Minho Son20/08/2024, 09:00
One-point correlators of conserved charges are argued to be perturbatively IR safe in QCD, which includes not only the density of energy, but also those of electric charge, isospin and baryon number. Theoretical and phenomenological aspects of the density matrix of one-point correlators will be discussed in the context of the states produced by a chiral current, as in the decay of a polarized...
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Jing Ren (Institute of High Energy Physics)20/08/2024, 09:30
As one of the major dark matter candidates, the ultralight Axion-Like Dark Matter (ALDM) exhibits a pronounced wave nature on astronomical scales and offers a promising solution to small-scale structure issues within local galaxies. While the linearly polarized pulsar light travels through the ALDM galactic halo, its position angle (PA) can be subject to an oscillation induced by the ALDM...
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Prof. JING SHU (PKU)20/08/2024, 10:00
Dark photons have emerged as promising candidates for dark matter, and their search is a top priority in particle physics, astrophysics, and cosmology. We report the first use of a tunable niobium superconducting radio-frequency cavity for a scan search of dark photon dark matter with innovative data analysis techniques. We mechanically adjusted the resonant frequency of a cavity submerged in...
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kenji kadota20/08/2024, 11:00
We explore the sensitivity of the radio telescope to the light dark matter such as sub-GeV dark matter and axion-like particles. We specifically analyze the impact of these light dark matter candidates on the formation of large-scale structures and the resultant 21 cm radio signals that the SKA is poised to detect. We will also discuss the complementarity of these forthcoming radio signal...
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Yi Wang (HKUST)20/08/2024, 11:30
It’s generally believed that the energy scale of cosmic inflation is much higher than that of the current particle physics colliders. Cosmological collider makes use of the extremely high energy scale of inflation, to determine the features of particles excited by the inflationary background, independent of the details of inflation models. In this talk, we will overview how to use the...
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Yi-Ming Zhong20/08/2024, 12:00
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Prof. Sichun Sun (Beijing Institute of Technology)20/08/2024, 14:30
We discuss ways to extend 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 heavy ion colliders and early cosmology. The phase transition is from a non-perturbative effect of the QCD. It can greatly impact the early universe, including gravitational wave signals...
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Takumi Kuwahara (Peking U)20/08/2024, 14:50
The decay of the mediator particle into standard model (SM) particles
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plays a significant role in exploring the dark sector scenario. We consider such a decay, taking the dark photon mediator as an example that mixes with the SM photon. We find that it requires a careful analysis of the decay rate in the presence of an SM vector boson
(e.g., Z boson, hadronic resonances, etc.) nearly... -
Zihang Wang (Institute of High Energy Physics)20/08/2024, 15:10
An analytic calculation is given for binary star evaporation under the tidal perturbation from randomly distributed, spatially extended dark objects. In particular, the Milky Way's wide binary star population is susceptible to such disruption from dark matter solitons. We identify high-probability `halo-like' wide binaries in GAIA EDR3 with separations larger than 0.1 parsec. Survival of the...
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Ms Jimin Wang (Center for Theoretical Physics and College of Physics, Jilin University, Changchun, 130012, China.)20/08/2024, 15:30
The chiral phase transition in QCD can be supercooled in the thermal history of the universe to be instantaneously out-of equilibrium, if QCD is coupled to a dark QCD sector exhibiting the dark chiral phase transition of the first order. In that case the QCD sigma meson field (as the chiral order parameter, or the light quark condensate) starts to roll in a nonadiabatic way down to the true...
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Yong Xu (MITP, JGU Mainz)20/08/2024, 16:30
Reheating is a theory explaining the transition of the Universe from the end of inflation to the radiation phase before Big Bang nucleosynthesis (BBN). Many beyond the Standard Model (BSM) phenomena, such as dark matter production, baryogenesis, and phase transitions, may have occurred before BBN. Probing the physics before BBN is challenging because the background is not transparent to usual...
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Yuepeng Guan (Jilin University)20/08/2024, 16:50
The electroweak (EW) phase transition in the early Universe might be supercooled due to the presence of the classical scale invariance involving Beyond the Standard Model (BSM) sectors and the supercooling could persist down till a later epoch around which the QCD chiral phase transition is supposed to take place. Since this supercooling period keeps masslessness for all the six SM quarks, it...
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Jie Liu (Jilin University)20/08/2024, 17:10
We propose a hybrid inflationary scenario based on eight-flavor hidden QCD with the hidden colored fermions being in part gauged under $U(1)_{B-L}$. This hidden QCD is almost scale-invariant, so-called walking, and predicts the light scalar meson (the walking dilaton) associated with the spontaneous scale breaking, which develops
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the Coleman-Weinberg (CW) type potential as the consequence... -
Yuxin Liu (International Centre of Theoretical Physics, Asia-Pacifc)20/08/2024, 17:30
The Event Horizon Telescope (EHT) has revolutionized our ability to study black holes by providing unprecedented spatial resolution and unveiling horizon-scale details. With advancements leading to the next-generation EHT, there is potential to probe even deeper into the black hole's dark region, especially the inner shadow characterized by low-intensity foreground emissions from the jet,...
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Prof. Lisheng Geng21/08/2024, 09:00
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21/08/2024, 09:10
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Tao Liu (HKUST)21/08/2024, 09:30
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Qiang Yuan (Purple Mountain Observatory)21/08/2024, 10:00
The Very Large Area gamma-ray Space Telescope (VLAST) is a mission concept proposed to detect gamma-ray photons through both the Compton scattering and electron-positron pair production mechanisms, enabling the detection of photons with energies ranging from MeV to TeV. VLAST is designed to have an acceptance of 10 m^2 sr which is four times larger than Fermi-LAT, an energy resolution of ~2%...
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Prof. Shinya Matsuzaki (Jilin University)21/08/2024, 11:00
This talk plans to introduce a couple of recent new phenomenologies and cosmology related to the QCD phase transition epoch, coupled to Beyond the Standard Model, in the thermal history of the universe. Baryogenesis, strong CP problem, and gravitational wave predictions will be covered in scenarios of this class, which can also be embedded into the scalegenesis to address the dynamical origin...
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Peter Athron21/08/2024, 11:30
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Seodong Shin (Jeonbuk National University)21/08/2024, 12:00
In this talk, I will discuss the excellent potential of neutrino neutral current interaction with 13C in neutrino experiments. The interaction induces the excited state 13C* subsequently emitting a 3.685 MeV photon from the de-excitation into the ground state. The probe of this distinctive signal can shed light in identifying the origin of the 5 MeV bump observed in reactor anti-neutrino...
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Prof. Bin Yan (IHEP)21/08/2024, 14:30
The violation of Lam-Tung relation in the high-$p_T^{\ell\ell}$ region of the Drell-Yan process at the LHC presents a long-standing discrepancy with the standard model prediction at $\mathcal{O}(\alpha_s^3)$ accuracy. In this Letter, we employed a model-independent analysis to investigate this anomaly within the framework of the Standard Model Effective Field Theory (SMEFT). Our findings...
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Tong Sun (Tsung-Dao Lee Institute, Shanghai Jiao Tong Univ. (CN))21/08/2024, 14:50
Dark SHINE is a fixed-target experiment initiative to search for light Dark Matter and mediators 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...
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Ngoc Khanh Vu (Tsung-Dao Lee Institute, Shanghai Jiao Tong University)21/08/2024, 15:10
Ref: https://arxiv.org/abs/2306.00641
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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... -
Shota Nakagawa (Tsung-Dao Lee Institute, Shanghai Jiao Tong University)21/08/2024, 15:30
The strong CP problem is one of the most important problem in the standard model. One plausible approach is spontaneous CP violation, where CP is an exact symmetry but is spontaneously broken to introduce the observed Cabibbo-Kobayashi-Maskawa (CKM) phase without producing large strong CP phase. In this talk, we present a composite model of spontaneous CP violation in supersymmetric QCD. The...
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Prof. Yu-Chen Guo (Liaoning Normal University)21/08/2024, 16:30
Anomalous gauge couplings provide unique insights into dimension-8 physics, which can be studied in great detail through multi-boson processes at high-energy colliders. In this talk, I will review our recent studies on anomalous gauge couplings in multi-boson physics. This includes tri-boson and vector boson scattering productions, probes on anomalous couplings, and the applications of machine...
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Gang Li (Sun Yat-Sen University)21/08/2024, 16:50
arXiv: 2407.06523 [hep-ph]:
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We study the ultraviolet completion of semileptonic four-fermion operator $O_{ledq}^{\alpha \beta 11}$ that incorporates Majorana dark matter (DM) in both lepton-flavor-conserving (LFC) and lepton-flavor-violating (LFV) scenarios at the one-loop level via box diagram, which effectively alleviates the lower bounds on the new physics scale. The interplay between the... -
Wei Su (SYSU)21/08/2024, 17:10
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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Zhaofeng Kang21/08/2024, 17:30
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Jia Liu (Peking University)22/08/2024, 09:00
We present a consistent derivation of the complete Wess-Zumino-Witten
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interactions of axions, including the counter-term necessary to guarantee the
gauge invariance of the Standard Model. By treating the derivative of the axion
field as a background gauge field and incorporating auxiliary chiral rotation
phases, we ensure consistency in the axion-interaction Lagrangian. This
approach... -
Jiayin Gu (Fudan University)22/08/2024, 09:30
Certain dimension-8 operator coefficients are subject to positivity bounds, derived from the fundamental principles of Quantum Field Theory, including unitarity, locality, analyticity and Lorentz invariance. In the first part of the talk, I will discuss how these positivity bounds can be probed by LHC or future lepton colliders. In the second part of the talk, I will discuss some of the...
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Daiki Ueda22/08/2024, 10:00
Relative entropy quantifies the difference between two probability distribution functions, which is connected with key properties of physics, such as the second law of thermodynamics. In this talk, one of the most attractive features of relative entropy, non-negativity, is briefly reviewed. Then, I consider the relative entropy between two theories with and without interaction between heavy...
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Christina Gao22/08/2024, 11:00
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Ningqiang Song (Institute of Theoretical Physics, Chinese Academy of Sciences)22/08/2024, 11:30
As the theoretical and experimental studies have entered the precision era, I will discuss some of the most well-motivated dark matter models in direct and indirect searches, with special focus on light dark matter.
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Yue-Lin Sming Tsai (Purple Mountain Observatory)22/08/2024, 12:00
We will discuss the remaining parameter space for WIMP-like dark matter with thermal relic density, focusing on two scenarios: the small interaction rate region and the small mass region. In the small interaction rate region, we reanalyze the prospects of detecting dark matter annihilation signals in the Galactic Center, particularly near the supermassive black hole (Sgr A*), by examining...
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Yue-Lin Sming Tsai (Purple Mountain Observatory)
We will discuss the remaining parameter space for WIMP-like dark matter with thermal relic density, focusing on two scenarios: the small interaction rate region and the small mass region. In the small interaction rate region, we reanalyze the prospects of detecting dark matter annihilation signals in the Galactic Center, particularly near the supermassive black hole (Sgr A*), by examining...
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春静 潘 (辽宁师范大学)
This study investigates Neutral Triple Gauge Couplings (nTGCs) through $ZZ$ production at future Electron Positron Colliders. We compare the signals and backgrounds associated with five different $ZZ$ decay channels and present our event selection strategies for different collision experiments. We provide numerical results for the coefficient constraints and derive final constraints by...
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