Measurement of the W charge asymmetry in the W →µν decay mode in pp collisions at √s = 7 TeV with the ATLAS detector

G. Aad, B. Abbott, J. Abdallah, A. A. Abdelalim, A. Abdesselam, O. Abdinov, B. Abi, M. Abolins, H. Abramowicz, H. Abreu, E. Acerbi, B. S. Acharya, D. L. Adams, T. N. Addy, J. Adelman, M. Aderholz, S. Adomeit, P. Adragna, T. Adye, S. AefskyJ. A. Aguilar-Saavedra, M. Aharrouche, S. P. Ahlen, F. Ahles, A. Ahmad, M. Ahsan, G. Aielli, T. Akdogan, T. P A Åkesson, G. Akimoto, A. V. Akimov, A. Akiyama, M. S. Alam, M. A. Alam, S. Albrand, M. Aleksa, I. N. Aleksandrov, F. Alessandria, C. Alexa, G. Alexander, G. Alexandre, T. Alexopoulos, M. Alhroob, M. Aliev, G. Alimonti, B. Budick, K. Cranmer, A. Haas, A. I. Mincer, P. Nemethy, ATLAS Collaboration

    Research output: Contribution to journalArticlepeer-review

    Abstract

    This Letter reports a measurement of the muon charge asymmetry from W bosons produced in proton- proton collisions at a centre-of-mass energy of 7 TeV with the ATLAS experiment at the LHC. The asymmetry is measured in the W →µν decay mode as a function of the muon pseudorapidity using a data sample corresponding to a total integrated luminosity of 31 pb-1. The results are compared to predictions based on next-to-leading order calculations with various parton distribution functions. This measurement provides information on the u and d quark momentum fractions in the proton.

    Original languageEnglish (US)
    Pages (from-to)31-49
    Number of pages19
    JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
    Volume701
    Issue number1
    DOIs
    StatePublished - 2011

    Keywords

    • Charge asymmetry
    • Muon decay mode
    • Parton distribution function
    • W production

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

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