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Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector

Aad, G.
•
Abbott, B.
•
Abdallah, J.
altro
Zwalinski, L.
2015
  • journal article

Periodico
PHYSICS LETTERS. SECTION B
Abstract
A search for the associated production of the Higgs boson with a top quark pair is performed in multilepton final states using 20.3 fb(-1) of proton-proton collision data recorded by the ATLAS experiment at root s = 8 TeVat the Large Hadron Collider. Five final states, targeting the decays H -> WW*, tau tau, and ZZ*, are examined for the presence of the Standard Model (SM) Higgs boson: two same-charge light leptons (e or mu) without a hadronically decaying tau lepton; three light leptons; two same-charge light leptons with a hadronically decaying tau lepton; four light leptons; and one light lepton and two hadronically decaying tau leptons. No significant excess of events is observed above the background expectation. The best fit for the t (t) over barH production cross section, assuming a Higgs boson mass of 125 GeV, is 2.1(-1.2)(+1.4) times the SM expectation, and the observed (expected) upper limit at the 95% confidence level is 4.7 (2.4) times the SM rate. The p-value for compatibility with the background-only hypothesis is 1.8s; the expectation in the presence of a Standard Model signal is 0.9 sigma. (C) 2015 CERN for the benefit of the ATLAS Collaboration. Published by Elsevier B.V.
DOI
10.1016/j.physletb.2015.07.079
WOS
WOS:000361562900076
Archivio
http://hdl.handle.net/11390/1096705
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85042705716
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84942813808&partnerID=40&md5=ab5569569d7a3d2c0203edda8c29f426
Diritti
metadata only access
Soggetti
  • Nuclear and High Ener...

Scopus© citazioni
73
Data di acquisizione
Jun 2, 2022
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Web of Science© citazioni
69
Data di acquisizione
Mar 23, 2024
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