Measurements of W and Z /γ∗ cross sections and their ratios in p+p collisions at RHIC
Funding Sponsor
National Science Foundation
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https://doi.org/10.1103/PhysRevD.103.012001
Document Type
Research Article
Publication Title
Physical Review D
Publication Date
1-4-2021
doi
10.1103/PhysRevD.103.012001
Abstract
We report on the W and Z/γ∗ differential and total cross sections as well as the W+/W- and (W++W-)/(Z/γ∗) cross section ratios measured by the STAR experiment at RHIC in p+p collisions at s=500 GeV and 510 GeV. The cross sections and their ratios are sensitive to quark and antiquark parton distribution functions. In particular, at leading order, the W cross section ratio is sensitive to the d¯/ū ratio. These measurements were taken at high Q2∼MW2,MZ2 and can serve as input into global analyses to provide constraints on the sea quark distributions. The results presented here combine three STAR datasets from 2011, 2012, and 2013, accumulating an integrated luminosity of 350 pb-1. We also assess the expected impact that our W+/W- cross section ratios will have on various quark distributions, and find sensitivity to the ū-d¯ and d¯/ū distributions.
Recommended Citation
APA Citation
Adam, J.
Adamczyk, L.
Adams, J.
Adkins, J.
...
(2021). Measurements of W and Z /γ∗ cross sections and their ratios in p+p collisions at RHIC. Physical Review D, 103(1),
10.1103/PhysRevD.103.012001
https://fount.aucegypt.edu/faculty_journal_articles/2407
MLA Citation
Adam, J., et al.
"Measurements of W and Z /γ∗ cross sections and their ratios in p+p collisions at RHIC." Physical Review D, vol. 103,no. 1, 2021,
https://fount.aucegypt.edu/faculty_journal_articles/2407