STI Publications - View Publication Form #16777
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Publication Information
| Title | Bayesian Monte Carlo extraction of sea asymmetry with SeaQuest and STAR data | ||||
| Abstract | We perform a global QCD analysis of unpolarized parton distributions within a Bayesian Monte Carlo framework, including for the first time $W$-lepton production data from the STAR Collaboration at RHIC and Drell-Yan di-muon data from the SeaQuest experiment at Fermilab. We assess the impact of these two new measurements on the light antiquark sea in the proton, and the $\dbar-\ubar$ asymmetry in particular. The SeaQuest data are found to significantly reduce the uncertainty on the $\dbar/\ubar$ ratio at large parton momentum fractions $x$, strongly favoring an enhanced $\bar d$ sea up to $x \approx 0.4$, in general agreement with nonperturbative calculations based on chiral symmetry breaking in QCD. | ||||
| Author(s) | Christopher Cocuzza, Wally Melnitchouk, Andreas Metz, Nobuo Sato | ||||
| Publication Date | October 2021 | ||||
| Document Type | Journal Article | ||||
| Primary Institution | Thomas Jefferson National Accelerator Facility, Newport News | ||||
| Affiliation | Theory & Comp Physics / THEORY CENTER / THEORY CENTER | ||||
| Funding Source | Nuclear Physics (NP) | ||||
| Proprietary? | No | ||||
| This publication conveys | Technical Science Results | ||||
| Document Numbers |
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| Associated with an experiment | No | ||||
| Associated with EIC | No | ||||
| Supported by Jefferson Lab LDRD Funding | No |
Journal Article
| Journal Name | Physical Review D |
| Refereed | Yes |
| Volume | 104 |
| Issue | |
| Page(s) | 074031 |
Attachments/Datasets/DOI Link
| Document(s) |
SeaQuest1.pdf
(STI Document)
PhysRevD.104.074031.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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