LLP2025: Fifteenth workshop of the Long-Lived Particle Community

Session

Theory and pheno VI

6 Jun 2025, 11:00

València - ADEIT

Conveners

Theory and pheno VI

• Albert De Roeck (CERN)
• Laura Molina Bueno (Univ. of Valencia and CSIC (ES))

89. Dark Higgs interpretation of H -> LLP LLP searches

Alberto Escalante Del Valle (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))

06/06/2025, 11:00

In this talk, I will present a reinterpretation of selected LHC searches for Higgs boson decays into long-lived particles (LLPs) in the context of a Standard Model plus scalar (SM+s) Dark Higgs model. The analysis is based on public data available in HEPData and focuses on comparing the sensitivity of different search strategies and final states. The aim is to explore how various approaches...

4. Revealing the Origin of Neutrino Masses through Displaced Shower Searches in the CMS Muon System

Wei Liu (Nanjing University of Science and Technology)

06/06/2025, 11:20

Remote

We study the potential to probe the origin of neutrino masses, by searching for long-lived right-handed neutrinos (RHNs) $N$ in the $B-L$ model and in the RHN-extended Standard Model (SM) Effective Field Theory (EFT). Despite the small active-sterile mixing $|V_{\ell N}|^2$, RHNs are produced abundantly via SM and exotic Higgs production, as long as the Higgs mixing or EFT operator...