Search for pairs of muons with small displacements in pp collisions at √s = 13 TeV with the ATLAS detector

0576452 - FZÚ 2024 RIV NL eng J - Článek v odborném periodiku
Aad, G. - Abbott, B. - Abeling, K. - 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 … celkem 2935 autorů
Search for pairs of muons with small displacements in pp collisions at √s = 13 TeV with the ATLAS detector.
Physics Letters. B. Roč. 846, Nov (2023), č. článku 138172. ISSN 0370-2693. E-ISSN 1873-2445
Výzkumná infrastruktura: CERN-CZ III - 90240
Institucionální podpora: RVO:68378271
Klíčová slova: upper limit * mass dependence * lepton * ATLAS * particle: long-lived
Obor OECD: Particles and field physics
Impakt faktor: 4.3, rok: 2022
Způsob publikování: Open access

A search for new phenomena giving rise to pairs of opposite electrically charged muons with impact parameters in the millimeter range is presented, using 139 fb−1 of s=13 TeV pp collision data from the ATLAS detector at the LHC. The search targets the gap in coverage between existing searches targeting final states with leptons with large displacement and prompt leptons. No significant excess over the background expectation is observed and exclusion limits are set on the mass of long-lived scalar supersymmetric muon-partners (smuons) with much lower lifetimes than previously targeted by displaced muon searches. Smuon lifetimes down to 1 ps are excluded for a smuon mass of 100 GeV, and smuon masses up to 520 GeV are excluded for a proper lifetime of 10 ps, at 95% confidence level. Finally, model-independent limits are set on the contribution from new phenomena to the signal-region yields.
Trvalý link: https://hdl.handle.net/11104/0346010