Search for single production of a heavy vector-like T quark decaying to a Higgs boson and a top quark with a lepton and jets in the final state


Khachatryan V., Sirunyan A. M., Tumasyan A., Adam W., Asilar E., Bergauer T., ...Daha Fazla

PHYSICS LETTERS B, cilt.771, ss.80-105, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 771
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.physletb.2017.05.019
  • Dergi Adı: PHYSICS LETTERS B
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.80-105
  • Anahtar Kelimeler: CMS, B2G, VLQ, Tprime, Higgs tagging, Physics, ELECTROWEAK SYMMETRY-BREAKING
  • Çukurova Üniversitesi Adresli: Evet

Özet

A search for single production of vector-like top quark partners (T) decaying into a Higgs boson and atop quark is performed using data from pp collisions at acentre-of-mass energy of 13 TeV collected by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 2.3 fb(-1). The top quark decay includes an electron or a muon while the Higgs boson decays into a pair of b quarks. No significant excess over standard model backgrounds is observed. Exclusion limits on the product of the production cross section and the branching fraction are derived in the T quark mass range 700 to 1800 GeV. For a mass of 1000 GeV, values of the product of the production cross section and the branching fraction greater than 0.8 and 0.7 pb are excluded at 95% confidence level, assuming left-and right-handed coupling of the T quark to standard model particles, respectively. This is the first analysis setting exclusion limits on the cross section of singly produced vector-like T quarks at a centre-of-mass energy of 13 TeV. (C) 2017 The Author(s). Published by Elsevier B.V.