Measurement of the top-quark mass in ttˉ events with dilepton final states in pp collisions at s√=7 TeV

CMS Collaboration

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

The top-quark mass is measured in proton-proton collisions at sqrt(s) = 7 TeV using a data sample corresponding to an integrated luminosity of 5.0 inverse femtobarns collected by the CMS experiment at the LHC. The measurement is performed in the dilepton decay channel t t-bar to ell+ nu[ell] b, ell- anti-nu[ell] b-bar, where ell=e,mu. Candidate top-quark decays are selected by requiring two leptons, at least two jets, and imbalance in transverse momentum. The mass is reconstructed with an analytical matrix weighting technique using distributions derived from simulated samples. Using a maximum-likelihood fit, the top-quark mass is determined to be 172.5 +/- 0.4 (stat) +/- 1.5 (syst) GeV.
Original languageEnglish
Article number2202
Number of pages21
JournalThe European Physical Journal C
Volume72
Publication statusPublished - 2012

Keywords

  • cERN LHC Coll
  • CMS

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