At the Fermilab Tevatron proton-antiproton ($p\overline{p}$) collider, high-mass electron-neutrino ($e\nu$) pairs are produced predominantly in the process $p\overline{p}\to W(\to e\nu )+X$. The asymmetry of the electron and positron yield as a function of their pseudorapidity constrain the slope of the ratio of the $u$- to $d$-quark parton distributions versus the fraction of the proton momentum carried by the quarks. This paper reports on the measurement of the electron-charge asymmetry using the full data set recorded by the Collider Detector at Fermilab in 2001–2011 and corresponding to $9.1{\mathrm{fb}}^{-1}$ of integrated luminosity. The measurement significantly improves the precision of the Tevatron constraints on the parton-distribution functions of the proton. Numerical tables of the measurement are provided.

• Received 9 July 2021
• Accepted 29 September 2021

DOI:https://doi.org/10.1103/PhysRevD.104.092002

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Published by the American Physical Society