# Measurements of $W$ and $Z/γ^*$ cross sections and their ratios in $pp$ collisions at STAR

### Submission summary

 As Contributors: Jae Nam Arxiv Link: https://arxiv.org/abs/2108.01029v1 (pdf) Date submitted: 2021-08-03 17:57 Submitted by: Nam, Jae Submitted to: SciPost Physics Proceedings Proceedings issue: DIS2021 Academic field: Physics Specialties: High-Energy Physics - Experiment Nuclear Physics - Experiment Approach: Experimental

### Abstract

While the unpolarized parton distribution functions of the valence quarks ($d$ and $u$) are well determined from DIS experiments, the sea quark counterparts, $\bar{d}$ and $\bar{u}$, are much less constrained, in particular, near the valence region. Measurements of $W^+/W^-$ production ratio in $pp$ collider experiments, such as the STAR experiment at RHIC, can probe the $\bar{d}/\bar{u}$ ratio at a large $Q^2$ set by the $W$ mass. These proceedings will discuss recent results of $W$ and $Z$ cross-section measurements using the STAR $pp$ collision data at a center-of-mass energy of $\sqrt{s} = 500/510\;\mathrm{GeV}$ collected in 2011, 2012, 2013 and 2017.

###### Current status:
Editor-in-charge assigned