Parts | Days | Selection | Search | Updates | Downloads | Help
T: Fachverband Teilchenphysik
T 13: Higgs Physics II
T 13.2: Talk
Monday, March 16, 2026, 16:30–16:45, KH 02.013
Search for light pseudoscalar bosons from Higgs boson decays in the four-kaon final state with the CMS detector — Nils Faltermann1, Jonas Floßmann1, •Johannes Hornung1, Benedikt Maier2, and Markus Klute1 — 1Karlsruher Institut für Technologie, Karlsruhe, Germany — 2Imperial College, London, United Kingdom
Since the discovery of the Higgs boson, extensive measurements of its properties have set upper limits on the branching ratio of its yet undetected decay modes. The branching ratio encompasses immediate decays into SM particles that are not detectable, as well as decays into BSM particles. This talk focuses on a search for Higgs boson decays into pairs of hypothetical pseudoscalar bosons a. These bosons can either be identified as pseudoscalar Axion-Like Particles (ALPs) or, more specifically, as additional Higgs Bosons, as suggested for example by the NMSSM. Specifically, the search strategy, focussing on the background estimation, and expected limits of an analysis targeting prompt decays H -> aa -> KKKK using data collected by the CMS detector during Run 2 of the LHC will be discussed.
Keywords: BSM; Pseudoscalar Bosons; Axion-Like Particle; ALPs; NMSSM