Search for charged Higgs bosons decaying into a top quark and a bottom quark at √(s) = 13 TeV with the ATLAS detector

2021/02/28 by ATLAS Collaboration, G. Aad, B. Abbott +98
Physics and Astronomy · #Boson #Bottom quark #Higgs boson #High-Energy Particle Collisions Research #Large Hadron Collider #Muon #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Quark #Top quark #hep-ex

paper · pdf · doi:10.1007/jhep06(2021)145

published as JHEP 06 (2021) 145 · 47 pages in total, author list starting page 31, 7 figures, 4 tables, submitted to JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2018-51/

openalex created_date 2018/08/22 · openalex publication_date 2021/06/01 · arxiv created 2021/07/12 · arxiv updated 2021/07/13 · openalex updated_date 2026/08/06

Abstract

A bstract A search for charged Higgs bosons decaying into a top quark and a bottom quark is presented. The data analysed correspond to 139 fb − 1 of proton-proton collisions at √(s) <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math> = 13 TeV, recorded with the ATLAS detector at the LHC. The production of a heavy charged Higgs boson in association with a top quark and a bottom quark, pp → tbH + → tbtb , is explored in the H + mass range from 200 to 2000 GeV using final states with jets and one electron or muon. Events are categorised according to the multiplicity of jets and b -tagged jets, and multivariate analysis techniques are used to discriminate between signal and background events. No significant excess above the background-only hypothesis is observed and exclusion limits are derived for the production cross-section times branching ratio of a charged Higgs boson as a function of its mass; they range from 3.6 pb at 200 GeV to 0.036 pb at 2000 GeV at 95% confidence level. The results are interpreted in the hMSSM and M_h¹²⁵ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>M</mml:mi> <mml:mi>h</mml:mi> <mml:mn>125</mml:mn> </mml:msubsup> </mml:math> scenarios.

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