2020/12/14 by Y. Gershtein, Yuri Gershtein, Simon Knapen +1
Physics and Astronomy · #Axion #Baryogenesis #CP violation #Computer science #Dark Matter and Cosmic Phenomena #Dark matter #Hadron #Hierarchy problem #Higgs boson #Large Hadron Collider #Nuclear physics #Parameter space #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Scalar (mathematics) #Vertex (graph theory) #hep-ph
paper · pdf · doi:10.1016/j.physletb.2021.136758
18 pages, 8 figures
arxiv created 2020/12/14 · openalex publication_date 2021/10/27 · arxiv updated 2021/11/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the physics case for a dedicated trigger on a low mass, hadronic displaced vertex at the high luminosity LHC, relying on the CMS phase II track trigger. We estimate the trigger efficiency with a simplified simulation of the CMS track trigger and show that the L1 trigger rate from fake vertices, B meson decays and secondary interactions with the detector material can likely be brought down to the kHz level with a minimal set of cuts. While it would with any doubt be a severe experimental challenge to implement, we conclude that a displaced vertex trigger could open qualitatively new parameter space for exotic Higgs decays, exotic B decays and even direct production of light resonances. We parametrize the physics potential in terms of a singlet scalar mixing with the Standard Model Higgs and an axion-like particle with a coupling to gluons, and review a number or relevant models motivated by the hierarchy and strong CP problems, Dark Matter and baryogenesis.