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 $W$ and $Z$ 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 $p+p$ and $p+d$ collisions by the SeaQuest experiment at Fermilab extends the large-$x$ 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 $x$.
Cited by 1
Dove et al., Measurement of flavor asymmetry of the light-quark sea in the proton with Drell-Yan dimuon production in
collisions at 120 GeV
Phys. Rev. C 108, 035202 (2023) [Crossref]
Authors / Affiliations: mappings to Contributors and OrganizationsSee all Organizations.
- 1 2 Sanghwa Park,
- 3 4 Alberto Accardi,
- 3 5 Xiaoxian Jing,
- 6 Joseph F. Owens
- 1 Stony Brook University [SUNY Stony Brook]
- 2 Mississippi State University [MSU]
- 3 Thomas Jefferson National Accelerator Facility [JLAB]
- 4 Hampton University
- 5 Southern Methodist University [SMU]
- 6 Florida State University [FSU]