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Measurement of the charge asymmetry of electrons from the decays of W bosons produced in pbar{p} collisions at sqrt{s}=1.96 TeV
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arxiv 2107.04678 v2 pith:S2YV7SDM submitted 2021-07-09 hep-ex
Measurement of the charge asymmetry of electrons from the decays of W bosons produced in pbar{p} collisions at sqrt{s}=1.96 TeV
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At the Fermilab Tevatron proton-antiproton ($p\bar{p}$) collider, high-mass electron-neutrino ($e\nu$) pairs are produced predominantly in the process $p \bar{p} \rightarrow W(\rightarrow e\nu) + X$. 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~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.
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