Measurement of the charge asymmetry of electrons from the decays of W bosons produced in p¯p collisions at √s = 1.96 TeV

CDF Collaboration: et al.At the Fermilab Tevatron proton-antiproton (p¯p) collider, high-mass electron-neutrino (eν) pairs are produced predominantly in the process p¯p→W(→eν)+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 9.1fb−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.Funded by SCOAP3.This work was supported by the U.S. Department of Energy and National Science Foundation; the Italian Istituto Nazionale di Fisica Nucleare; the U.S. Department of Energy and the Italian Istituto Nazionale di Fisica Nucleare summer-student exchange program for the years 2014 and 2015; the Ministry of Education, Culture, Sports, Science and Technology of Japan; the Natural Sciences and Engineering Research Council of Canada; the National Science Council of the Republic of China; the Swiss National Science Foundation; the A. P. Sloan Foundation; the Bundesministerium für Bildung und Forschung, Germany; the National Research Foundation of Korea (Grants No. 2018R1A6A1A06024970); the Science and Technology Facilities Council and the Royal Society, United Kingdom; the Russian Foundation for Basic Research; the Ministerio de Ciencia e Innovación, and Programa Consolider-Ingenio 2010, Spain; the Slovak R&D Agency; the Academy of Finland; and the Australian Research Council (ARC).Peer reviewe