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

Session

Experiments

31 May 2024, 15:30

414 Zhongshan Col. (中山院414)

Conveners

Experiments

• Bin Yan (IHEP)

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...

56. New physics probed with off-Z-pole data

Zhuoni Qian (Hangzhou Normal University)

31/05/2024, 15:55

Oral talk

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...

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

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...