A search with minimal model dependence for physics beyond the Standard Model in events featuring three or four charged leptons (3l and 4l, l = e, mu) is presented. The analysis aims to be sensitive to a wide range of potential new-physics theories simultaneously. This analysis uses data from pp collisions delivered by the Large Hadron Collider at a centre-of-mass energy of root s = 13 TeV and recorded with the ATLAS detector, corresponding to the full Run 2 dataset of 139 fb(-1). The 3l and 4l phase space is divided into 22 event categories according to the number of leptons in the event, the missing transverse momentum, the invariant mass of the leptons, and the presence of leptons originating from a Z-boson candidate. These event categories are analysed independently for the presence of deviations from the Standard Model. No statistically significant deviations from the Standard Model predictions are observed. Upper limits for all signal regions are reported in terms of the visible cross-section.

Search for new phenomena in three- or four-lepton events in pp collisions at √s=13 TeV with the ATLAS detector [Search for new phenomena in three- or four-lepton events in pp collisions at root s=13 TeV with the ATLAS detector] / G. Aad, B.A.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 824:(2022 Dec 14), pp. 136832.1-136832.24. [10.1016/j.physletb.2021.136832]

Search for new phenomena in three- or four-lepton events in pp collisions at √s=13 TeV with the ATLAS detector [Search for new phenomena in three- or four-lepton events in pp collisions at root s=13 TeV with the ATLAS detector]

A. Andreazza
Membro del Collaboration Group
;
E. Ballabene
Membro del Collaboration Group
;
L. Carminati
Membro del Collaboration Group
;
S. D'Auria
Membro del Collaboration Group
;
L. Dell'Asta
Membro del Collaboration Group
;
M. Fanti
Membro del Collaboration Group
;
M. Lazzaroni
Membro del Collaboration Group
;
C. Meroni
Membro del Collaboration Group
;
D.P. Mungo
Membro del Collaboration Group
;
A. Murrone
Membro del Collaboration Group
;
L. Perini
Membro del Collaboration Group
;
F. Piazza
Membro del Collaboration Group
;
F. Ragusa
Membro del Collaboration Group
;
A. Stabile
Membro del Collaboration Group
;
2022

Abstract

A search with minimal model dependence for physics beyond the Standard Model in events featuring three or four charged leptons (3l and 4l, l = e, mu) is presented. The analysis aims to be sensitive to a wide range of potential new-physics theories simultaneously. This analysis uses data from pp collisions delivered by the Large Hadron Collider at a centre-of-mass energy of root s = 13 TeV and recorded with the ATLAS detector, corresponding to the full Run 2 dataset of 139 fb(-1). The 3l and 4l phase space is divided into 22 event categories according to the number of leptons in the event, the missing transverse momentum, the invariant mass of the leptons, and the presence of leptons originating from a Z-boson candidate. These event categories are analysed independently for the presence of deviations from the Standard Model. No statistically significant deviations from the Standard Model predictions are observed. Upper limits for all signal regions are reported in terms of the visible cross-section.
Settore FIS/01 - Fisica Sperimentale
Settore ING-INF/07 - Misure Elettriche e Elettroniche
14-dic-2022
https://www.sciencedirect.com/science/article/pii/S0370269321007723?via=ihub
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/909166
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