Results are presented from a search for heavy bottom-like quarks, pair-produced in pp collisions at √s = 7 TeV, undertaken with the CMS experiment at the LHC. The b0 quarks are assumed to decay exclusively to tW. The b0b0 → tW−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 b0 quarks having masses below 611 GeV/c2is excluded at 95% confi-dence level.

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

Abstract

Results are presented from a search for heavy bottom-like quarks, pair-produced in pp collisions at √s = 7 TeV, undertaken with the CMS experiment at the LHC. The b0 quarks are assumed to decay exclusively to tW. The b0b0 → tW−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 b0 quarks having masses below 611 GeV/c2is excluded at 95% confi-dence level.
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2012
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/117054
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