Search for pair production of vector-like quarks in the bW(b)over-barW channel from proton-proton collisions at root s=13TeV

Carregando...
Imagem de Miniatura

Data

2018-04-10

Autores

Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Ambrogi, F.
Asilar, E.
Bergauer, T.
Brandstetter, J.
Brondolin, E.
Dragicevic, M.
Ero, J.

Título da Revista

ISSN da Revista

Título de Volume

Editor

Elsevier B.V.

Resumo

A search is presented for the production of vector-like quark pairs, T (T) over bar or Y (Y) over bar, with electric charge of 2/3(T) or -4/3(Y), in proton-proton collisions at root 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 (approximate to 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. (c) 2018 The Author(s). Published by Elsevier B.V.

Descrição

Palavras-chave

CMS, Physics, Vector-like quarks

Como citar

Physics Letters B. Amsterdam: Elsevier Science Bv, v. 779, p. 82-106, 2018.