Search for heavy, top-like quark pair production in the dilepton final state in pp collisions at √s = 7 TeV

Authors

• CMS Collaboration
• Ekaterina Avdeeva, University of Nebraska-LincolnFollow
• Kenneth A. Bloom, University of Nebraska-LincolnFollow
• S. Bose, University of Nebraska-LincolnFollow
• J. Butt, University of Nebraska-Lincoln
• Daniel R. Claes, University of Nebraska-LincolnFollow
• Aaron Dominguez, University of Nebraska-LincolnFollow
• Michael Eads, University of Nebraska-LincolnFollow
• P. Jindal, University of Nebraska-Lincoln
• J. Keller, University of Nebraska-LincolnFollow
• Ilya Kravchenko, University of Nebraska-LincolnFollow
• J. Lazo-Flores, University of Nebraska-LincolnFollow
• H. Malbouisson, University of Nebraska-Lincoln
• Sudhir Malik, University of Nebraska-LincolnFollow
• Gregory Snow, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

2012

Citation

Physics Letters B 716 (2012) 103–121; http://dx.doi.org/10.1016/j.physletb.2012.07.059

Abstract

The results of a search for pair production of a heavy, top-like quark, t', in the decay mode t't̅' → bW⁺ b̅W⁻ → bℓ ⁺νb̅ℓ ⁻ν̅ are presented. The search is performed with a data sample corresponding to an integrated luminosity of 5.0 fb⁻¹ in pp collisions at a center-of-mass energy of 7 TeV, collected by the CMS experiment at the LHC. The observed number of events agrees with the expectation from standard model processes, and no evidence of t't̅' production is found. Upper limits on the production cross section as a function of t' mass are presented, and t' masses below 557 GeV/c² are excluded at the 95% confidence level.