STI Publications - View Publication Form #16764
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Publication Information
| Title | Global QCD analysis of pion parton distributions with threshold resummation | ||||
| Abstract | We perform the first global QCD analysis of pion valence, sea quark, and gluon distributions within a Bayesian Monte Carlo framework with threshold resummation on Drell-Yan cross sections at next-to-leading log accuracy. Exploring various treatments of resummation, we find that the large-$x$ asymptotics of the valence quark distribution $\sim (1-x)^{\beta_v}$ can differ significantly, with $\beta_v$ ranging from $\approx 1$ to $> 2.5$ at the input scale. Regardless of the specific implementation, however, the resummation induced redistribution of the momentum between valence quarks and gluons boosts the total momentum carried by gluons to $\approx 40\%$, increasing the gluon contribution to the pion mass to $\approx 40$~MeV. | ||||
| Author(s) | Patrick Barry, Chueng JI, Nobuo Sato, Wally Melnitchouk | ||||
| Publication Date | November 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 Letters |
| Refereed | Yes |
| Volume | 127 |
| Issue | |
| Page(s) | 232001 |
Attachments/Datasets/DOI Link
| Document(s) |
Resummation_Pions.pdf
(STI Document)
PhysRevLett.127.232001.pdf
(Accepted Manuscript)
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| DOI Link | |
| Dataset(s) | (none) |
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