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Scientific article
Open access
English

Search for single production of a vectorlike T quark decaying into a Higgs boson and top quark with fully hadronic final states using the ATLAS detector

ContributorsATLAS Collaboration
Published inPhysical review. D, vol. 105, no. 9, 092012
Publication date2022
First online date2022-05-25
Abstract

A search is made for a vectorlike T quark decaying into a Higgs boson and a top quark in 13 TeV proton-proton collisions using the ATLAS detector at the Large Hadron Collider with a data sample corresponding to an integrated luminosity of 139  fb-1. The Higgs-boson and top-quark candidates are identified in the all-hadronic decay mode, where H→bb¯ and t→bW→bqq¯′ are reconstructed as large-radius jets. The candidate Higgs boson, top quark, and associated B hadrons are identified using tagging algorithms. No significant excess is observed above the background, so limits are set on the production cross section of a singlet T quark at 95% confidence level, depending on the mass mT and coupling κT of the vectorlike T quark to Standard Model particles. In the considered mass range between 1.0 and 2.3 TeV, the upper limit on the allowed coupling values increases with mT from a minimum value of 0.35 for 1.07<mT<1.4  TeV to 1.6 for mT=2.3  TeV.

eng
Keywords
  • P p: colliding beams
  • Quark: postulated particle
  • Quark: single production
  • Final state: hadronic
  • Final state: ((n)jet)
  • P p: scattering
  • Quark: decay modes
  • Higgs particle: hadronic decay
  • Bottom: pair production
  • Top: hadronic decay
  • Quark: vector particle
  • ATLAS
  • Singlet
  • CERN LHC Coll
  • Background
  • Channel cross section: upper limit
  • Mass dependence
  • Quark: mass
  • Coupling constant: upper limit
  • Experimental results
  • 13000 GeV-cms
Citation (ISO format)
ATLAS Collaboration. Search for single production of a vectorlike <i>T </i>quark decaying into a Higgs boson and top quark with fully hadronic final states using the ATLAS detector. In: Physical review. D, 2022, vol. 105, n° 9, p. 092012. doi: 10.1103/physrevd.105.092012
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Article (Published version)
Identifiers
ISSN of the journal2470-0010
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