Search in diphoton and dielectron final states for displaced production of Higgs or \nZ bosons with the ATLAS detector in √s=13 TeV pp collisions

0576507 - FZÚ 2024 RIV US eng J - Journal Article
Aad, G. - Abbott, B. - Abbott, D.C. - Chudoba, Jiří - Federičová, Pavla - Hejbal, Jiří - Jačka, Petr - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Latoňová, Věra - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2973 authors
Search in diphoton and dielectron final states for displaced production of Higgs or
Z bosons with the ATLAS detector in √s=13 TeV pp collisions.
Physical Review D. Roč. 108, č. 1 (2023), č. článku 012012. ISSN 2470-0010. E-ISSN 2470-0029
Research Infrastructure: CERN-CZ III - 90240
Institutional support: RVO:68378271
Keywords : supersymmetry: symmetry breaking * neutral particle: long-lived * ATLAS * Higgs particle: radiative decay
OECD category: Particles and field physics
Impact factor: 5, year: 2022
Method of publishing: Open access

A search is presented for displaced production of Higgs bosons or Z bosons, originating from the decay of a neutral long-lived particle (LLP) and reconstructed in the decay modes H→γγ and Z→ee. The analysis uses the full Run 2 dataset of proton-proton collisions delivered by the LHC at an energy of s=13  TeV between 2015 and 2018 and recorded by the ATLAS detector, corresponding to an integrated luminosity of 139  fb-1. Exploiting the capabilities of the ATLAS liquid argon calorimeter to precisely measure the arrival times and trajectories of electromagnetic objects, the analysis searches for the signature of pairs of photons or electrons which arise from a common displaced vertex and which arrive after some delay at the calorimeter. The results are interpreted in a gauge-mediated supersymmetry breaking model with pair-produced Higgsinos that decay to LLPs, and each LLP subsequently decays into either a Higgs boson or a Z boson.
Permanent Link: https://hdl.handle.net/11104/0346064