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

Journal Article · Thu Jul 14 00:00:00 EDT 2022 · SciPost Physics Proceedings

DOI:https://doi.org/10.21468/SciPostPhysProc.8.140· OSTI ID:1876137

Nam, Jae ^[1]

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1. Temple University

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

• Sponsoring Organization: USDOE
• OSTI ID: 1876137
• Journal Information: SciPost Physics Proceedings, Journal Name: SciPost Physics Proceedings Journal Issue: 8; ISSN 2666-4003
• Publisher: Stichting SciPost
• Country of Publication: Netherlands
• Language: English