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
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 →b W →b q 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 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 .
- Publication:
-
Physical Review D
- Pub Date:
- May 2022
- DOI:
- 10.1103/PhysRevD.105.092012
- arXiv:
- arXiv:2201.07045
- Bibcode:
- 2022PhRvD.105i2012A
- Keywords:
-
- High Energy Physics - Experiment
- E-Print:
- 52 pages in total, author list starting at page 37, 10 figures, 2 tables, published in Phys. Rev. D 105 (2022) 092012. All figures are available at: https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2019-07/