Measurement of the muon charge asymmetry from W boson decays

TL;DR

This paper reports a measurement of muon charge asymmetry from W boson decays at the Fermilab Tevatron, providing data to refine parton distribution functions and improve understanding of proton structure.

Contribution

First measurement of muon charge asymmetry from W decays at Tevatron, comparing results with NLO predictions to aid PDF constraints.

Findings

Measured muon charge asymmetry with 0.3 fb^{-1} data

Results consistent with NLO calculations using CTEQ6.1M and MRST04 PDFs

Data can refine future parton distribution function fits

Abstract

We present a measurement of the muon charge asymmetry from W boson decays using 0.3 fb^{-1} of data collected at \sqrt{s}=1.96 GeV between 2002 and 2004 with the D0 detector at the Fermilab Tevatron ppbar Collider. We compare our findings with expectations from next-to-leading-order calculations performed using the CTEQ6.1M and MRST04 NLO parton distribution functions. Our findings can be used to constrain future parton distribution function fits.