Search for new phenomena in multi-body invariant masses in events with at least one isolated lepton and two jets using √s = 13 TeV proton–proton collision data collected by the ATLAS detector

0578219 - FZÚ 2024 RIV DE 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 2935 authors
Search for new phenomena in multi-body invariant masses in events with at least one isolated lepton and two jets using √s = 13 TeV proton–proton collision data collected by the ATLAS detector.
Journal of High Energy Physics. Roč. 2023, č. 7 (2023), č. článku 202. ISSN 1029-8479. E-ISSN 1029-8479
Research Infrastructure: CERN-CZ II - 90104
Institutional support: RVO:68378271
Keywords : pp: colliding beams * resonance: production * width: difference
OECD category: Particles and field physics
Impact factor: 5.4, year: 2022
Method of publishing: Open access

A search for resonances in events with at least one isolated lepton (e or μ) and two jets is performed using 139 fb−1−1 of ss ​ = 13 TeV proton–proton collision data recorded by the ATLAS detector at the LHC. Deviations from a smoothly falling background hypothesis are tested in three- and four-body invariant mass distributions constructed from leptons and jets, including jets identified as originating from bottom quarks. Model-independent limits on generic resonances characterised by cascade decays of particles leading to multiple jets and leptons in the final state are presented. The limits are calculated using Gaussian shapes with different widths for the invariant masses. The multi-body invariant masses are also used to set 95% confidence level upper limits on the cross-section times branching ratios for the production and subsequent decay of resonances predicted by several new physics scenarios.

Permanent Link: https://hdl.handle.net/11104/0347249