Measurement of the top quark mass in the tt¯→dilepton channel from s=8 TeV ATLAS data

The ATLAS Collaboration, Z. Idrissi

    Research output: Contribution to journalArticle

    61 Citations (Scopus)

    Abstract

    The top quark mass is measured in the tt¯→dilepton channel (lepton=e,μ) using ATLAS data recorded in the year 2012 at the LHC. The data were taken at a proton–proton centre-of-mass energy of s=8 TeV and correspond to an integrated luminosity of about 20.2 fb−1. Exploiting the template method, and using the distribution of invariant masses of lepton–b-jet pairs, the top quark mass is measured to be mtop=172.99±0.41 (stat)±0.74 (syst) GeV, with a total uncertainty of 0.84 GeV. Finally, a combination with previous ATLAS mtop measurements from s=7 TeV data in the tt¯→dilepton and tt¯→lepton+jets channels results in mtop=172.84±0.34 (stat)±0.61 (syst) GeV, with a total uncertainty of 0.70 GeV.

    Original languageEnglish
    Pages (from-to)350-371
    Number of pages22
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume761
    DOIs
    Publication statusPublished - 2016 Oct 10

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    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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