Search for a light charged Higgs boson in t → H±b decays, with H± → cs, in pp collisions at √s = 13 TeV with the ATLAS detector
department or school: Science, Faculty of
department or school: TRIUMF
department or school: Non UBC
department or school: Physics and Astronomy, Department of
data provider: DSpace
identifier citation: The European Physical Journal C. 2025 Feb 06;85(2):153
rights copyright: The Author(s)
creator: ATLAS Collaboration
issued: 2025-02-07T23:31:31Z
issued: 2025-02-06
description: A search for a light charged Higgs boson produced in decays of the top quark, t → H±b with H± → cs, is presented. This search targets the production of top-quark pairs tt ¯ → WbH±b, with W → ν ( = e, μ), resulting in a lepton-plus-jets final state characterised by an isolated electron or muon and at least four jets. The search exploits b-quark and c-quark identification techniques as well as multivariate methods to suppress the dominant tt ¯ background. The data analysed correspond to 140 fb−1 of pp collisions at √s = 13 TeV recorded with the ATLAS detector at the LHC between 2015 and 2018. Observed (expected) 95% confidence-level upper limits on the branching fraction B(t → H±b), assuming B(t → W b) + B(t → H±(→ cs)b) = 1.0, are set between 0.066% (0.077%) and 3.6% (2.3%) for a charged Higgs boson with a mass between 60 and 168 GeV.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/90348
note: Eur. Phys. J. C (2025) 85:153 https://doi.org/10.1140/epjc/s10052-024-13715-4Regular Article - Experimental PhysicsSearch for a light charged Higgs boson in t → H±b decays, withH± → cs, in pp collisions at √s = 13 TeV with the ATLASdetectorATLAS CollaborationCERN, 1211 Geneva 23, SwitzerlandReceived: 16 July 2024 / Accepted: 17 December 2024© CERN for the benefit of the ATLAS Collaboration 2025Abstract A search for a light charged Higgs boson pro-duced in decays of the top quark, t → H±b with H± → cs,is presented. This search targets the production of top-quarkpairs t t¯ → W bH±b, with W → ν ( = e, μ), result-ing in a lepton-plus-jets final state characterised by an iso-lated electron or muon and at least four jets. The searchexploits b-quark and c-quark identification techniques as wellas multivariate methods to suppress the dominant t t¯ back-ground. The data analysed correspond to 140 fb−1 of ppcollisions at√s = 13 TeV recorded with the ATLAS detec-tor at the LHC between 2015 and 2018. Observed (expected)95% confidence-level upper limits on the branching fractionB(t → H±b), assuming B(t → W b) + B(t → H±(→cs)b) = 1.0, are set between 0.066% (0.077%) and 3.6%(2.3%) for a charged Higgs boson with a mass between 60and 168 GeV.Contents1 Introduction . . . . . . . . . . . . . . . . . . . . . .2 ATLAS detector . . . . . . . . . . . . . . . . . . . .3 Data and simulated event samples . . . . . . . . . . .4 Object definition and event selection . . . . . . . . .5 Background modelling . . . . . . . . . . . . . . . . .6 Analysis strategy . . . . . . . . . . . . . . . . . . . .6.1 t t¯-system reconstruction . . . . . . . . . . . . .6.2 Multivariate signal extraction . . . . . . . . . . .7 Systematic uncertainties . . . . . . . . . . . . . . . .8 Statistical interpretation . . . . . . . . . . . . . . . .9 Results . . . . . . . . . . . . . . . . . . . . . . . . .10 Conclusions . . . . . . . . . . . . . . . . . . . . . .References . . . . . . . . . . . . . . . . . . . . . . . …
has type: Article
is shown at: 10.14288/1.0448042
language: eng
peer review status: Reviewed
provider: Vancouver : University of British Columbia Library
publisher: Springer Berlin Heidelberg
publisher DOI: 10.1140/epjc/s10052-024-13715-4
rights: Attribution 4.0 International (CC BY 4.0)
rights URI: http://creativecommons.org/licenses/by/4.0/
scholar level: Faculty
scholar level: Researcher
type: Text
identifier URI: http://hdl.handle.net/2429/90348