第十二届中国 LHC 物理会议（CLHCP2026）

In recent years, a number of experiments dedicated to searches for long-lived particles (LLPs) have been proposed or approved, or have entered operation. While the sensitivities of these experiments to various LLP scenarios have been extensively studied, key aspects—such as detector geometries, background estimates, and projected operational durations—for several facilities, including...

The 125  GeV Higgs boson validates the Standard‑Model electroweak symmetry‑breaking mechanism, while open puzzles such as dark matter, neutrino masses, and primordial phase transitions strongly motivate extended scalar‑sector new physics. In this talk, we investigate collider phenomenology of additional scalar particles within 2HDM+S, SM+octet+S, NMSSM and other beyond‑SM frameworks. We...

腾讯会议: 952-527-429

A search for pairs of light neutral pseudoscalar bosons ($A$) resulting from the decay of a Higgs boson is performed. The search is conducted using LHC proton-proton collision data at $\sqrt{s}=13~\mathrm{TeV}$, collected with the CMS detector in 2016--2018 and corresponding to an integrated luminosity of $138~\mathrm{fb}^{-1}$. The $A$ boson decays into a highly...

Photophobic axion-like particles (ALPs) have suppressed couplings to diphotons but can still interact with electroweak gauge bosons. In this talk, we investigate the discovery prospects for heavy photophobic ALPs at the High-Luminosity Large Hadron Collider (HL-LHC, $\sqrt{s}=14$ TeV) and a future 100 TeV proton–proton collider, with particular emphasis on the latter. Assuming a vanishing...

We study a generalized NMSSM in which a gauge singlet connects the MSSM $\mu$ problem to neutrino masses from the type-II seesaw. Its vacuum expectation value contributes to $\mu_{\rm eff}$ and generates the supersymmetric mass of a vectorlike electroweak triplet pair. Integrating out the triplets yields the Weinberg operator, while their gauge charges admit a possible messenger...

The latest results of search for ttbar resonances at CMS will be presented

Tencent/VooV Meeting: 952-527-429

This paper presents a search for semi-visible Higgs boson decays in final states with a photon ($\gamma$) and missing transverse momentum ($p_T^{miss}$). The analysis is optimised for the gluon-gluon fusion production channel and exploits a novel trigger deployed in 2023, with reduced thresholds down to 50 GeV on the photon transverse momentum ($p_T^\gamma$) and 70 GeV on the $p_T^{miss}$, in...