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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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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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