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

• Main Authors: Khachatryan, Vardan, Sirunyan, A. M., Tumasyan, A. R., Adam, Wolfgang, Asilar, Ece, Md. Ali, Mohd. Adli
• Format: Article
• Language: English; English; English
• Published: Elsevier B.V. 2017
• Subjects: Q Science (General); QC Physics
• Online Access: http://irep.iium.edu.my/63118/1/63118_Search%20for%20single%20production%20of%20a%20heavy%20vector_new_article.pdf; http://irep.iium.edu.my/63118/2/63118_Search%20for%20single%20production%20of%20a%20heavy%20vector_scopus.pdf; http://irep.iium.edu.my/63118/13/63118_Search%20for%20single%20production%20of%20a%20heavy%20_wos.pdf; http://irep.iium.edu.my/63118/; https://reader.elsevier.com/reader/sd/pii/S0370269317303805?token=FC6B2F1239B0EFDD2390E1F038B8CE442FC5F7B4EAB71997E8D02D0626994151C68AA34EDB5F92CAEEFE6FE4C34618E2

A search for single production of vector-like top quark partners (T) decaying into a Higgs boson and a top quark is performed using data from pp collisions at a centre-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.