Search for heavy bottom-like quarks in 4.9 fb(-1) of pp collisions at root s=7 TeV

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doi:10.1007/JHEP05(2012)123

Results are presented from a search for heavy bottom-like quarks, pair-produced in pp collisions at root s = 7 TeV, undertaken with the CMS experiment at the LHC. The b' quarks are assumed to decay exclusively to tW. The b'(b') over bar -> tW(-)(t) over barW(+) 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. RI Gregores, Eduardo/F-8702-2012; Novaes, Sergio/D-3532-2012; Lokhtin, Igor/D-7004-2012; Padula, Sandra /G-3560-2012; Flix, Josep/G-5414-2012; Fruhwirth, Rudolf/H-2529-2012; Chen, Jie/H-6210-2011; Tinoco Mendes, Andre David/D-4314-2011; Azzi, Patrizia/H-5404-2012; Torassa, Ezio/I-1788-2012