Search for pair production of vector-like quarks in the bWbW channel from proton–proton collisions at √s = 13TeV

CMS Collaboration, Shimaa Abu Zeid, Freya Blekman, Jorgen D'Hondt, Isabelle Helena De Bruyn, Kevin Deroover, Steven Lowette, Seth Moortgat, Lieselotte Moreels, Quentin Python, Stefaan Tavernier, Walter Van Doninck, Petra Van Mulders, Isis Marina Van Parijs, Jarne De Clercq, Giannis Flouris, Denys Lontkovskyi

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

A search is presented for the production of vector-like quark pairs, TT‾ or YY‾ with electric charge of 2/3 (T) or −4/3 (Y), in proton–proton collisions at s=13TeV. The data were collected by the CMS experiment at the LHC in 2016 and correspond to an integrated luminosity of 35.8fb −1. The T and Y quarks are assumed to decay exclusively to a W boson and a b quark. The search is based on events with a single isolated electron or muon, large missing transverse momentum, and at least four jets with large transverse momenta. In the search, a kinematic reconstruction of the final state observables is performed, which would permit a signal to be detected as a narrow mass peak (≈7% resolution). The observed number of events is consistent with the standard model prediction. Assuming strong pair production of the vector-like quarks and a 100% branching fraction to bW, a lower limit of 1295 GeV at 95% confidence level is set on the T and Y quark masses.

Original languageEnglish
Pages (from-to)82-106
Number of pages25
JournalPhysics Letters B
Volume779
DOIs
Publication statusPublished - 10 Apr 2018

Keywords

  • CMS
  • Physics
  • Vector-like quarks

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