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Measurements of $W$ and $Z/γ^*$ cross sections and their ratios in $pp$ collisions at STAR
by Jae Nam
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Submission summary
| Authors (as registered SciPost users): | Jae Nam |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2108.01029v2 (pdf) |
| Date accepted: | May 6, 2022 |
| Date submitted: | Feb. 15, 2022, 3:03 p.m. |
| Submitted by: | Jae Nam |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 28th Annual Workshop on Deep-Inelastic Scattering (DIS) and Related Subjects (DIS2021) |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| 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.
Published as SciPost Phys. Proc. 8, 140 (2022)