Conveners
Physics Beyond SM: 1
- 瑞(Rui) 张(Zhang) (南京大学(Nanjing University))
Physics Beyond SM: 2
- María Olalla Olea Romacho
- Johannes Braathen (DESY)
Physics Beyond SM: 3
- Hao Zhang (IHEP)
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Xiang Chen (Shanghai Jiao Tong University)23/10/2026, 11:0006: Physics Beyond the SMOral Presentation
A strong first-order electroweak phase transition (EWPT) can be realized through the introduction of a light scalar that is weakly coupled to the Higgs boson. Such weak couplings can result in a macroscopic lifetime, leading to displaced decays that provide a distinctive experimental signature. In this talk, we investigate the sensitivity of future lepton colliders to long-lived scalars "s"...
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Maria Savina (JINR)23/10/2026, 11:2006: Physics Beyond the SMOral Presentation
The search for dark matter at accelerators has a long history, dating back to the first proposals for the LHC and even earlier. While complementary to direct detection in certain respects, accelerator-based searches offer distinct advantages, particularly when investigating a complex dark sector and multi-step processes. As a precision machine with unique potential, the planned CEPC...
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Bruce Mellado (IHEP)23/10/2026, 11:4006: Physics Beyond the SMOral Presentation
A number of excesses observed in LHC data have motivated the hypothesis of a new Higgs-like scalar with a mass near 152 GeV. This presentation will begin with a brief introduction to the history of the 152 GeV candidate, from the multi-lepton anomalies and the prediction of a scalar mass near 150 GeV to the subsequent excesses observed in the \gamma\gamma, Z\gamma, and WW channels.
The main...
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Keping (可平) Xie (谢) (Tsung-Dao Lee Institute, Shanghai Jiao Tong University)23/10/2026, 12:00
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CRISTIAN SIERRA (上海交通大学), Cristian Sierra (TDLI)23/10/2026, 16:00Oral Presentation
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Xinran XU (The Hong Kong University of Science and Technology), Xinran Xu (hkust)23/10/2026, 16:20Oral Presentation
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kodai sakurai23/10/2026, 16:40Oral Presentation
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Alexey Drutskoy (LPI), Alexey Drutskoy (LPI)23/10/2026, 17:00Oral Presentation
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Alim Ruzi (school of physics Peking Uniersity)23/10/2026, 17:20Oral Presentation
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Zeren Simon (泽人) Wang (王) (Hefei University of Technology), Zeren Simon Wang (University of Bonn)24/10/2026, 09:00Oral Presentation
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Prof. Bin Yan (IHEP)24/10/2026, 09:20Oral Presentation
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Juraj Klaric24/10/2026, 09:40Oral Presentation
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家琳 李 (上海交通大学)24/10/2026, 10:00
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Alexey Drutskoy (LPI)06: Physics Beyond the SMOral Presentation
The invisible width of the Z boson was measured with high accuracy at LEP. Within the Standard Model, this value indicates three active neutrino families. However, New physics models can lead to deviations from this estimate. Therefore, it is important to measure the Z decay branching fraction for a specific neutrino flavor. We propose a new method to precisely measure the Z decay branching...
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Xinran Xu (The Hong Kong University of Science and Technology)06: Physics Beyond the SMOral Presentation
We investigate the phenomenology of 2 Higgs doublet models (2HDMs) with a new $U(1)$ gauge symmetry, $U(1)_X$, by which flavor changing neutral currents are forbidden at tree level. As an important consequence of the spontaneous breaking of both the $U(1)_X$ and electroweak symmetries by electroweak vacuum expectation values, upper limits appear on masses of an additional gauge boson $Z'$ and...
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kodai sakurai06: Physics Beyond the SMOral Presentation
Higgs precision measurements provide an opportunity to test various extended Higgs models. To exploit the high precision of future experimental measurements, theoretical predictions must be calculated with comparable precision by including higher-order corrections. To probe the structure of the Higgs sector through future precision measurements, we have developed a program, H-COUP, which...
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Keping (可平) Xie (谢) (Tsung-Dao Lee Institute, Shanghai Jiao Tong University)06: Physics Beyond the SMOral Presentation
In this talk, I will cover both the Axion-Like Particles and Tau weak electric dipole moments. Our combined analysis shows that mono-V and non-resonant VBS channels provide powerful and complementary probes of ALP-gauge boson interactions. Tau spin correlations at the Z pole probe CP violation with a sensitivity that depends strongly on the spin projection. For a fixed Z sample, transverse...
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Prof. Yuri Kulchitsky (JINR / IP NASB)06: Physics Beyond the SMOral Presentation
The two-Higgs-doublet model with a light pseudoscalar singlet (2HDM + a) provides a wellmotivated dark matter (DM) framework, but hadron colliders face severe background ceilings
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in the light-scalar (mh1) and light-mediator (ma) windows, while non-relativistic directdetection bounds are momentum-suppressed. To address these experimental bottlenecks, this study investigates the potential of... -
Yuri Kulchitsky (Joint Institute for Nuclear Research)Oral Presentation
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Xiang Chen (Shanghai Jiao Tong University), Xiang Chen (Physik-Institut, Universit¨at Z¨urich,)
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Cristian Sierra (TDLI)06: Physics Beyond the SMOral Presentation
Future high-luminosity $e^+e^-$ colliders such as CEPC and FCCee will measure the Higgsstrahlung cross section $e^+e^- \to Zh$ with sub-percent precision, offering a unique window into probing extended scalar sectors. We present a complete one-loop electroweak calculation of this process in the real triplet Higgs model with a non--zero triplet vev, using a fully automated renormalisation...
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Prof. Bin Yan (IHEP)06: Physics Beyond the SMOral Presentation
Photon pairs have provided an ideal laboratory for exploring entanglement and Bell inequality violation in low-energy experiments. Extending such studies to high-energy colliders is of great interest but has yet to be explored. Exploiting the photon conversion process for nearly on-shell photons, we formulate a factorization framework and an effective two-qubit description, which enable access...
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Mariya Savina (JINR)Oral Presentation
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Zeren Simon (泽人) Wang (王) (Hefei University of Technology)06: Physics Beyond the SMOral Presentation
We investigate the sensitivity of proposed CEPC and FCC-ee with a center-of-mass energy of 240 GeV to long-lived dark photons heavier than 2 GeV that are pair-produced via the prompt decays of a light scalar mixed with the Standard-Model Higgs boson. We compute the production and decay rates of both the light scalar and the dark photon, and develop two search strategies targeting displaced...
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Bruce Mellado (IHEP), Bruce Mellado (University of the Witwatersrand)Oral Presentation
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Juraj Klaric06: Physics Beyond the SMOral Presentation
Future lepton colliders such as CEPC and FCC-ee are capable of producing trillions of Z-bosons. Such Tera-Z factories can discover new elementary particles with couplings to the Z-boson several orders of magnitude smaller than current bounds, and could also measure the new particles' properties in detail. Using simple analytic estimates, we quantify how the discovery reach and measurement...
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Alim Ruzi (school of physics Peking Uniersity)06: Physics Beyond the SMOral Presentation
We explore quantum entanglement and Bell-inequality violation in Higgs decays at the CEPC, using simulated e+e−→ZH events at $\sqrt{s} = $ 250 GeV with 50 $\mathrm{ab}^−1$. From lepton angular distributions in $H\to ZZ^*\to$ 4ℓ, we reconstruct the ZZ spin-density matrix and test the CGLMP inequality for a two-qutrit system. Considering semileptonic and pure-leptonic associated-Z channels, we...
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