Measurement of the electron charge asymmetry in ppbar->W+X->enu+X events at sqrt{s}=1.96 TeV

TL;DR

This paper reports a measurement of the electron charge asymmetry in proton-antiproton collisions at 1.96 TeV, providing data to refine proton structure models and test quantum chromodynamics predictions.

Contribution

It presents the first detailed measurement of electron charge asymmetry as a function of transverse momentum and pseudorapidity at Tevatron energies.

Findings

Measured asymmetry across electron kinematic range

Compared results with next-to-leading order QCD predictions

Data will improve proton parton distribution functions

Abstract

We present a measurement of the electron charge asymmetry in ppbar->W+X->enu+X events at a center of mass energy of 1.96 TeV using 0.75 fb-1 of data collected with the D0 detector at the Fermilab Tevatron Collider. The asymmetry is measured as a function of the electron transverse momentum and pseudorapidity in the interval (-3.2, 3.2) and is compared with expectations from next-to-leading order calculations in perturbative quantum chromodynamics. These measurements will allow more accurate determinations of the proton parton distribution functions.