Results are presented from a search for heavy bottom-like quarks, pair-produced in pp collisions at âs = 7TeV, undertaken with the CMS experiment at the LHC. The bâ² quarks are assumed to decay exclusively to tW. The bâ²bÌâ² â tW-tÌW+ 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 bâ² quarks having masses below 611 GeV/c2 is excluded at 95% confidence level.
Search for heavy bottom-like quarks in 4.9 fb-1 of pp collisions at âs = 7 TeV
ALBERGO, Sebastiano Francesco;CAPPELLO, GIGI;CHIORBOLI, MASSIMILIANO;COSTA, Salvatore;POTENZA, Renato Carlo;TRICOMI, Alessia Rita;TUVE', Cristina Natalina;
2012-01-01
Abstract
Results are presented from a search for heavy bottom-like quarks, pair-produced in pp collisions at âs = 7TeV, undertaken with the CMS experiment at the LHC. The bâ² quarks are assumed to decay exclusively to tW. The bâ²bÌâ² â tW-tÌW+ 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 bâ² quarks having masses below 611 GeV/c2 is excluded at 95% confidence level.File in questo prodotto:
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