MONDAL, Santu. Tau-lepton fake-rate determination for the ttH coupling measurement using the ATLAS detector at the LHC. In Proceedings of Science. Praha: Published by Sissa Medialab srl Partita IVA, 2021, p. 1-3. ISSN 1824-8039. Available from: https://dx.doi.org/10.22323/1.390.0100.
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Basic information
Original name Tau-lepton fake-rate determination for the ttH coupling measurement using the ATLAS detector at the LHC
Authors MONDAL, Santu (356 India, guarantor, belonging to the institution).
Edition Praha, Proceedings of Science, p. 1-3, 3 pp. 2021.
Publisher Published by Sissa Medialab srl Partita IVA
Other information
Original language English
Type of outcome Proceedings paper
Field of Study 10303 Particles and field physics
Confidentiality degree is not subject to a state or trade secret
Publication form printed version "print"
WWW URL
RIV identification code RIV/47813059:19630/21:A0000172
Organization unit Institute of physics in Opava
ISSN 1824-8039
Doi http://dx.doi.org/10.22323/1.390.0100
Keywords in English Bosons; Large dataset; Tellurium compounds
Tags 2022, FÚ, RIV22
Tags International impact, Reviewed
Changed by Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 16/3/2022 12:12.
Abstract
A search for the associated production of a top-quark pair with the Higgs boson (ttH ¯) in multilepton final states is presented. The search is based on a dataset of proton-proton collisions at vs = 13 TeV and an integrated luminosity of 80 fb-1 recorded with the ATLAS detector at the CERN Large Hadron Collider. A synopsis of the final state with two same-charge light leptons (e or µ) and one hadronically-decaying t is described in more detail. Non-prompt light leptons background is estimated from simulation, with data-driven corrections and fake thad backgrounds are estimated using data-driven techniques. An excess of events consistent with ttH ¯ production, over the expected background from Standard Model processes, is found with an observed significance of 1.8 standard deviations, compared to an expectation of 3.1 standard deviations. Assuming Standard Model branching fractions, the best-fit value of the ttH ¯ production cross section is sttH ¯ = 294+-182162 fb, which is consistent with the Standard Model prediction.
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