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

Park, Sanghwa; Accardi, Alberto; Jing, Xiaoxian; Owens, Joseph F.

doi:10.21468/SciPostPhysProc.8.177

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

Journal Article · Tue Jul 11 00:00:00 EDT 2023 · SciPost Physics Proceedings

DOI:https://doi.org/10.21468/SciPostPhysProc.8.177· OSTI ID:1989266

Park, Sanghwa ^[1]; Accardi, Alberto ^[2]; Jing, Xiaoxian ^[3]; Owens, Joseph F. ^[4]

Mississippi State University, Stony Brook University
Hampton University, Thomas Jefferson National Accelerator Facility
Southern Methodist University, Thomas Jefferson National Accelerator Facility
Florida State University

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 W $W$ and Z $Z$ 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 p+p $p + p$ and p+d $p + d$ collisions by the SeaQuest experiment at Fermilab extends the large- x $x$ 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 x $x$ .

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-06OR23177; FG02-05ER41372; SC0008791; SC0010129

OSTI ID:: 1989266

Journal Information:: SciPost Physics Proceedings, Journal Name: SciPost Physics Proceedings Journal Issue: 8; ISSN 2666-4003

Publisher:: Stichting SciPostCopyright Statement

Country of Publication:: Netherlands

Language:: English

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