Results are presented from a search for heavy bottom-like quarks, pair-produced in pp collisions at sqrt(s)=7 TeV, undertaken with the CMS experiment at the LHC. The b′ quarks are assumed to decay exclusively to tW. The bbtW−tW+ process can be identified by its distinctive signatures of three leptons or two leptons of same charge, and at least one b-quark jet. Using a data sample corresponding to an integrated luminosity of 4.9 fb−1, observed events are compared to the standard model background predictions, and the existence of b′ quarks having masses below 611 GeV/c 2 is excluded at 95% confidence level.

Search for heavy bottom-like quarks in 4.9 fb−1 of pp collisions at $ \sqrt {s} = 7 $ TeV

TOSI, SILVANO;
2012-01-01

Abstract

Results are presented from a search for heavy bottom-like quarks, pair-produced in pp collisions at sqrt(s)=7 TeV, undertaken with the CMS experiment at the LHC. The b′ quarks are assumed to decay exclusively to tW. The bbtW−tW+ process can be identified by its distinctive signatures of three leptons or two leptons of same charge, and at least one b-quark jet. Using a data sample corresponding to an integrated luminosity of 4.9 fb−1, observed events are compared to the standard model background predictions, and the existence of b′ quarks having masses below 611 GeV/c 2 is excluded at 95% confidence level.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/385988
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