Search for supersymmetry in final states with missing transverse momentum and three or more b-jets in 139 fb−1 of proton–proton collisions at √s = 13 TeV with the ATLAS detector
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Date
2023
Authors
Aad, G.
Abbott, B.
Abbott, D.C.
Abeling, K.
Abidi, S.H.
Aboulhorma, A.
Abramowicz, H.
Abreu, H.
Abulaiti, Y.
Abusleme Hoffman, A.C.
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Journal article
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European Physical Journal C, 2023; 83(7):561-1-561-41
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The Atlas Collaboration … G. Aad … E. K. Filmer … P. Jackson ... A.X.Y. Kong … H. Potti … E.X.L. Ting … M. J. White … et al.
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Abstract
A search for supersymmetry involving the pair production of gluinos decaying via off-shell third-generation squarks into the lightest neutralino (χ˜ 0 1 ) is reported. It exploits LHC proton–proton collision data at a centre-ofmass energy √s = 13 TeV with an integrated luminosity of 139 fb−1 collected with the ATLAS detector from 2015 to 2018. The search uses events containing large missing transverse momentum, up to one electron or muon, and several energetic jets, at least three of which must be identified as containing b-hadrons. Both a simple kinematic event selection and an event selection based upon a deep neuralnetwork are used. No significant excess above the predicted background is found. In simplified models involving the pair production of gluinos that decay via off-shell top (bottom) squarks, gluino masses less than 2.44 TeV (2.35 TeV) are excluded at 95% CL for a massless χ˜ 0 1 . Limits are also set on the gluino mass in models with variable branching ratios for gluino decays to bb¯χ˜ 0 1 , tt ¯χ˜ 0 1 and tb¯χ˜ − 1 /tb¯ χ˜ + 1 .
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© CERN for the benefit of the ATLAS collaboration 2023. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecomm ons.org/licenses/by/4.0/. Funded by SCOAP3.