Search for pair production of a heavy up-type quark decaying to a W boson and a b quark in the lepton+jets channel with the ATLAS detector


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Aad G., Abbott B., Abdallah J., Abdelalim A., Abdesselam A., Abdinov O., ...More

Physical Review Letters, vol.108, no.26, 2012 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 108 Issue: 26
  • Publication Date: 2012
  • Doi Number: 10.1103/physrevlett.108.261802
  • Journal Name: Physical Review Letters
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Ankara University Affiliated: Yes

Abstract

A search is presented for production of a heavy up-type quark (t') together with its antiparticle, assuming subsequent decay to a W boson and a b quark, t't̄'→W+bW-b̄. The search is based on 1.04fb-1 of proton-proton collisions at √s=7TeV collected by the ATLAS detector at the CERN Large Hadron Collider. Data are analyzed in the lepton+jets final state, characterized by a high transverse momentum isolated electron or muon, high missing transverse momentum, and at least three jets. No significant excess of events above the background expectation is observed. A 95% C.L. lower limit of 404GeV is set for the mass of the t' quark. © 2012 CERN.