Measurement of the charge asymmetry of electrons from the decays of W bosons produced in pp collisions at √(s)=1.96 TeV

2021/07/09 by T. Aaltonen, CDF Collaboration, Aaltonen, T. +807
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ex

paper · pdf · doi:10.48550/arxiv.2107.04678

27 pages, 25 figures. To be published in PRD

openalex publication_date 2021/07/09 · arxiv created 2021/11/02 · arxiv updated 2021/11/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

At the Fermilab Tevatron proton-antiproton (pp) 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 9.1~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.

Related

• Measurements of W charge asymmetry
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