Home > Research > Publications & Outputs > Search for the associated production of the Hig...

Electronic data

  • 1-s2.0-S0370269315005997-main

    Rights statement: Open Access funded by SCOAP³ - Sponsoring Consortium for Open Access Publishing in Particle Physics Under a Creative Commons license

    Final published version, 1 MB, PDF-document

    Available under license: CC BY: Creative Commons Attribution 4.0 International License


Text available via DOI:

View graph of relations

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

Research output: Contribution to journalJournal article

  • ATLAS Collaboration
<mark>Journal publication date</mark>7/10/2015
<mark>Journal</mark>Physics Letters B
Number of pages23
Pages (from-to)519-541
<mark>Original language</mark>English


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 View the MathML source at the Large Hadron Collider. Five final states, targeting the decays H→WW*, ττ , and ZZ*, are examined for the presence of the Standard Model (SM) Higgs boson: two same-charge light leptons (e or μ) without a hadronically decaying τ lepton; three light leptons; two same-charge light leptons with a hadronically decaying τ lepton; four light leptons; and one light lepton and two hadronically decaying τ leptons. No significant excess of events is observed above the background expectation. The best fit for the View the MathML source production cross section, assuming a Higgs boson mass of 125 GeV, is View the MathML source 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 1.8σ; the expectation in the presence of a Standard Model signal is 0.9σ.