A search is presented for the production of vector-like quark pairs, T$\overline\mathrmT$ or Y$\overline\mathrmY$, with electric charge of 2/3 (T) or -4/3 (Y), in proton-proton collisions at $\sqrts =$ 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.

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

Cavallo, N.;Fabozzi, F.;
2018-01-01

Abstract

A search is presented for the production of vector-like quark pairs, T$\overline\mathrmT$ or Y$\overline\mathrmY$, with electric charge of 2/3 (T) or -4/3 (Y), in proton-proton collisions at $\sqrts =$ 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.
2018
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11563/133487
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