Academic Journal
Global QCD Analysis of Pion Parton Distributions with Threshold Resummation.
| Τίτλος: | Global QCD Analysis of Pion Parton Distributions with Threshold Resummation. |
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| Συγγραφείς: | Barry PC; Jefferson Lab, Newport News, Virginia 23606, USA., Ji CR; Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA., Sato N; Jefferson Lab, Newport News, Virginia 23606, USA., Melnitchouk W; Jefferson Lab, Newport News, Virginia 23606, USA. |
| Συλλογικό Έργο: | JAM Collaboration |
| Πηγή: | Physical review letters [Phys Rev Lett] 2021 Dec 03; Vol. 127 (23), pp. 232001. |
| Τύπος έκδοσης: | Journal Article |
| Γλώσσα: | English |
| Στοιχεία περιοδικού: | Publisher: American Physical Society Country of Publication: United States NLM ID: 0401141 Publication Model: Print Cited Medium: Internet ISSN: 1079-7114 (Electronic) Linking ISSN: 00319007 NLM ISO Abbreviation: Phys Rev Lett Subsets: MEDLINE; PubMed not MEDLINE |
| Imprint Name(s): | Original Publication: New York : American Physical Society |
| Περίληψη: | 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 ∼(1-x)^{β_{v}} can differ significantly, with β_{v} ranging from ≈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 ≈40%, increasing the gluon contribution to the pion mass to ≈40 MeV. |
| Entry Date(s): | Date Created: 20211222 Latest Revision: 20211222 |
| Update Code: | 20260130 |
| DOI: | 10.1103/PhysRevLett.127.232001 |
| PMID: | 34936801 |
| Βάση Δεδομένων: | MEDLINE |
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