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

Chatrchyan S., Khachatryan V., Sirunyan A., Tumasyan A., Adam W., Bergauer T., ...More

Journal of High Energy Physics, vol.2012, no.5, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 2012 Issue: 5
  • Publication Date: 2012
  • Doi Number: 10.1007/jhep05(2012)123
  • Journal Name: Journal of High Energy Physics
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: Hadron-Hadron Scattering
  • Yıldız Technical University Affiliated: No


Results are presented from a search for heavy bottom-like quarks, pair-produced in pp collisions at √s = 7TeV, undertaken with the CMS experiment at the LHC. The b′ quarks are assumed to decay exclusively to tW. The b′b̄′ → tW-t̄W+ 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/c2 is excluded at 95% confidence level.