Λεπτομέρειες βιβλιογραφικής εγγραφής
| Τίτλος: |
First Monte Carlo Global QCD Analysis of Pion Parton Distributions. |
| Συγγραφείς: |
Barry PC; North Carolina State University, Raleigh, North Carolina 27607, USA., Sato N; University of Connecticut, Storrs, Connecticut 06269, USA., Melnitchouk W; Jefferson Lab, Newport News, Virginia 23606, USA., Ji CR; North Carolina State University, Raleigh, North Carolina 27607, USA. |
| Συλλογικό Έργο: |
Jefferson Lab Angular Momentum (JAM) Collaboration |
| Πηγή: |
Physical review letters [Phys Rev Lett] 2018 Oct 12; Vol. 121 (15), pp. 152001. |
| 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: PubMed not MEDLINE |
| Imprint Name(s): |
Original Publication: New York : American Physical Society |
| Περίληψη: |
We perform the first global QCD analysis of parton distribution functions (PDFs) in the pion, combining πA Drell-Yan data with leading neutron electroproduction from HERA within a Monte Carlo approach based on nested sampling. Inclusion of the HERA data allows the pion PDFs to be determined down to much lower values of x, with relatively weak model dependence from uncertainties in the chiral splitting function. The combined analysis reveals that gluons carry a significantly higher pion momentum fraction, ∼30%, than that inferred from Drell-Yan data alone, with sea quarks carrying a somewhat smaller fraction, ∼15%, at the input scale. Within the same effective theory framework, the chiral splitting function and pion PDFs can be used to describe the d[over ¯]-u[over ¯] asymmetry in the proton. |
| Entry Date(s): |
Date Created: 20181027 Date Completed: 20181031 Latest Revision: 20181031 |
| Update Code: |
20260130 |
| DOI: |
10.1103/PhysRevLett.121.152001 |
| PMID: |
30362780 |
| Βάση Δεδομένων: |
MEDLINE |