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CJ15 global PDF analysis with new electroweak data from the STAR and SeaQuest experiments

by Sanghwa Park, Alberto Accardi, Xiaoxian Jing, J.F. Owens

Submission summary

As Contributors: Sanghwa Park
Preprint link: scipost_202107_00030v1
Date submitted: 2021-07-19 23:04
Submitted by: Park, Sanghwa
Submitted to: SciPost Physics Proceedings
Proceedings issue: DIS2021
Academic field: Physics
Specialties:
  • Nuclear Physics - Theory

Abstract

We present updates to a recent CTEQ-Jefferson Lab (CJ) global analysis of parton distribution functions with a new set of electroweak data that provide unique access to quark flavor separation in the proton. In particular, recent $\boldsymbol W$ and $\boldsymbol Z$ boson measurements from the STAR experiment at RHIC put additional constraints on light quarks and antiquarks near the valence regime. The new measurement of the Drell-Yan lepton pair production ratio in $\boldsymbol{p+p}$ and $\boldsymbol{p+d}$ collisions by the SeaQuest experiment at Fermilab extends the large-$\boldsymbol x$ coverage of the previous E866 experiment and sheds new light on the light antiquarks distribution. In this report, the impact of these new data sets on parton distribution functions will be presented with emphasis given to the flavor asymmetry of the light antiquark sea at large values of the parton momentum $\boldsymbol x$.

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Submission scipost_202107_00030v1 on 19 July 2021

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