Pontificia Universidad Católica de Chile Pontificia Universidad Católica de Chile
Aad G., Abbott B., Abbott D. C., Abud A. A., Abeling K., Abhayasinghe D. K., Abusleme A. (2022)

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

Revista : Physical Review D
Volumen : 105
Número : 9
Tipo de publicación : ISI Ir a publicación

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?b¯b and t?bW?bq¯q? 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 ?T of the vector like T quark to Standard Model particles. In the considered mass range between1.0and 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=2.3TeV.