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

Atlas Collaboration

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51 Citations (Scopus)

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 language English 31-49 19 Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 701 1 https://doi.org/10.1016/j.physletb.2011.05.024 Published - 2011 Jun 27

Keywords

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

ASJC Scopus subject areas

• Nuclear and High Energy Physics

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