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Title: Search for vector-like T quarks decaying to top quarks and Higgs bosons in the all-hadronic channel using jet substructure

Abstract

We performed a search for a vector-like heavy T quark that is produced in pairs and that decays to a top quark and a Higgs boson. The data analysed correspond to an integrated luminosity of 19.7 fb-1collected with the CMS detector in proton-proton collisions at √s=8 TeV. For T quarks with large mass values the top quarks and Higgs bosons can have significant Lorentz boosts, so that their individual decay products often overlap and merge. Methods are applied to resolve the substructure of such merged jets. We also derived upper limits on the production cross section of a T quark with mass between 500 and 1000 GeV/c 2. If the T quark decays exclusively to tH, the observed (expected) lower limit on the mass of the T quark is 745 (773) GeV/c 2 at 95% confidence level. For the first time an algorithm is used for tagging boosted Higgs bosons that is based on a combination of jet substructure information and b tagging.

Authors:
 [1]
  1. Yerevan Physics Inst. (YerPhI), Yerevan (Armenia). et al.
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Org.:
CMS Collaboration
OSTI Identifier:
1221275
Report Number(s):
FERMILAB-PUB-15-116-CMS; CERN-PH-EP-2015-034; CMS-B2G-14-002
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1503.01952
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2015; Journal Issue: 6; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Hadron-Hadron Scattering; beyond standard model; top physics

Citation Formats

Khachatryan, Vardan. Search for vector-like T quarks decaying to top quarks and Higgs bosons in the all-hadronic channel using jet substructure. United States: N. p., 2015. Web. doi:10.1007/JHEP06(2015)080.
Khachatryan, Vardan. Search for vector-like T quarks decaying to top quarks and Higgs bosons in the all-hadronic channel using jet substructure. United States. https://doi.org/10.1007/JHEP06(2015)080
Khachatryan, Vardan. Fri . "Search for vector-like T quarks decaying to top quarks and Higgs bosons in the all-hadronic channel using jet substructure". United States. https://doi.org/10.1007/JHEP06(2015)080. https://www.osti.gov/servlets/purl/1221275.
@article{osti_1221275,
title = {Search for vector-like T quarks decaying to top quarks and Higgs bosons in the all-hadronic channel using jet substructure},
author = {Khachatryan, Vardan},
abstractNote = {We performed a search for a vector-like heavy T quark that is produced in pairs and that decays to a top quark and a Higgs boson. The data analysed correspond to an integrated luminosity of 19.7 fb-1collected with the CMS detector in proton-proton collisions at √s=8 TeV. For T quarks with large mass values the top quarks and Higgs bosons can have significant Lorentz boosts, so that their individual decay products often overlap and merge. Methods are applied to resolve the substructure of such merged jets. We also derived upper limits on the production cross section of a T quark with mass between 500 and 1000 GeV/c 2. If the T quark decays exclusively to tH, the observed (expected) lower limit on the mass of the T quark is 745 (773) GeV/c 2 at 95% confidence level. For the first time an algorithm is used for tagging boosted Higgs bosons that is based on a combination of jet substructure information and b tagging.},
doi = {10.1007/JHEP06(2015)080},
journal = {Journal of High Energy Physics (Online)},
number = 6,
volume = 2015,
place = {United States},
year = {Fri Jun 12 00:00:00 EDT 2015},
month = {Fri Jun 12 00:00:00 EDT 2015}
}

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Works referencing / citing this record:

Dreaming awake: disentangling the underlying physics in case of a SUSY-like discovery at the LHC
journal, September 2019

  • Matchev, Konstantin T.; Moortgat, Filip; Pape, Luc
  • Journal of Physics G: Nuclear and Particle Physics, Vol. 46, Issue 11
  • DOI: 10.1088/1361-6471/ab3bb8