Measurement of the mass difference between top and anti-top quarks in pp collisions at √s=7 TeV using the ATLAS detector

ATLAS Collaboration

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

A measurement of the mass difference between top and anti-top quarks is presented. In a 4.7 fb−1 data sample of proton–proton collisions at s=7 TeV recorded with the ATLAS detector at the LHC, events consistent with tt¯ production and decay into a single charged lepton final state are reconstructed. For each event, the mass difference between the top and anti-top quark candidate is calculated. A two b-tag requirement is used in order to reduce the background contribution. A maximum likelihood fit to these per-event mass differences yields Δm≡mt−m=0.67±0.61(stat)±0.41(syst) GeV, consistent with CPT invariance.

Original languageEnglish
Pages (from-to)363-379
Number of pages17
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume728
DOIs
Publication statusPublished - 2014 Jan 20

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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