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

• Main Authors: Sirunyan, A. M., Tumasyan, A. R., Adam, Wolfgang, Ambrogi, Federico, Asilar, Ece, Md. Ali, Mohd. Adli
• Format: Article
• Language: English; English
• Published: Elsevier B.V. 2018
• Subjects: Q Science (General); QC Physics
• Online Access: http://irep.iium.edu.my/69734/1/69734_Search%20for%20pair%20production%20of%20vector-like%20quarks%20in%20the%20bWb%E2%80%BEW_article.pdf; http://irep.iium.edu.my/69734/2/69734_Search%20for%20pair%20production%20of%20vector-like%20quarks%20in%20the%20bWb%E2%80%BEW_scopus.pdf; http://irep.iium.edu.my/69734/; https://reader.elsevier.com/reader/sd/pii/S0370269318300959?token=F195B674F645CEB3F4D9AE9E1E892FF391098446F687DB6290AA20A60113BE7D52C460439E7F801BCA4163F19432C85A

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 = 13 TeV. The data were collected by the CMS experiment at the LHC in 2016 and correspond to an integrated luminosity of 35.8 fb−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