https://scholars.lib.ntu.edu.tw/handle/123456789/606431
標題: | Global QCD Analysis of Pion Parton Distributions with Threshold Resummation | 作者: | Barry P.C Ji C.-R Sato N Melnitchouk W. NOBUO SATO |
關鍵字: | Atomic physics;Asymptotics;Bayesian;Drell-Yan;Parton distributions;Resummation;Sea quarks;Total momentum;Hadrons;article;gluon;quark | 公開日期: | 2021 | 卷: | 127 | 期: | 23 | 來源出版物: | Physical Review Letters | 摘要: | 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)βv can differ significantly, with βv 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. ? 2021 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121312051&doi=10.1103%2fPhysRevLett.127.232001&partnerID=40&md5=cc80875220f2fe6a39007cc901415dce https://scholars.lib.ntu.edu.tw/handle/123456789/606431 |
ISSN: | 00319007 | DOI: | 10.1103/PhysRevLett.127.232001 |
顯示於: | 數學系 |
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