期刊
PHYSICAL REVIEW LETTERS
卷 128, 期 14, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.128.142003
关键词
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资金
- U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-SC0012704, DE-AC02-06CH11357]
- U.S. Department of Energy, Office of Science, Office of Nuclear Physics
- NSFC [11775096]
- Guangdong Major Project of Basic and Applied Basic Research [2020B0301030008]
- National Science Foundation under CAREER Grant [PHY-1847893]
- RHIC Physics Fellow Program of the RIKEN BNL Research Center
- Oak Ridge Leadership Computing Facility, a DOE Office of Science User Facility [DE-AC05-00OR22725]
- Office of Science of the U.S. Department of Energy
- LDRD initiative at Argonne National Laboratory [2020-0020]
- U.S. Department of Energy, Office of Science
- U.S. Department of Energy, Office of Nuclear Physics
- U.S. Department of Energy, Office of Advanced Scientific Computing Research
This study reports the first lattice QCD calculation of pion valence quark distribution with next-to-next-to-leading order perturbative matching correction. Through renormalization and perturbative matching, reliable determination of valence quark distribution within a certain range is achieved.
We report the first lattice QCD calculation of pion valence quark distribution with next-to-next-toleading order perturbative matching correction, which is done using two fine lattices with spacings a = 0.04 and 0.06 fm and valence pion mass m pi = 300 MeV, at boost momentum as large as 2.42 GeV. As a crucial step to control the systematics, we renormalize the pion valence quasidistribution in the recently proposed hybrid scheme, which features a Wilson-line mass subtraction at large distances in coordinate space, and develop a procedure to match it to the MS scheme. We demonstrate that the renormalization and the perturbative matching in Bjorken-x space yield a reliable determination of the valence quark distribution for 0.03 less than or similar to x less than or similar to 0.80 with 5%-20% uncertainties.
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