Search for pair production of vector-like quarks in the channel from proton–proton collisions at
A search is presented for the production of vector-like quark pairs, T$$\overline{\mathrm{T}}$$or Y$$\overline{\mathrm{Y}}$$, with electric charge of 2/3 (T) or -4/3 (Y), in proton-proton collisions at $$\sqrt{s} =$$ 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 ($$\approx$$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.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- CMS Collaboration
- Grant/Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1437820
- Alternate ID(s):
- OSTI ID: 1409853
- Report Number(s):
- FERMILAB-PUB-17-551-CMS; CMS-B2G-17-003; CERN-EP-2017-224; arXiv:1710.01539; S0370269318300959; PII: S0370269318300959
- Journal Information:
- Physics Letters B, Journal Name: Physics Letters B Vol. 779 Journal Issue: C; ISSN 0370-2693
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- Netherlands
- Language:
- English
Web of Science
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