期刊
PHYSICAL REVIEW LETTERS
卷 120, 期 15, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.152502
关键词
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资金
- U.S. Department of Energy [DE-AC05-06OR23177]
- National Science Foundation [PHY-1623454, PHY-1653405, PHY-1659177]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1623454] Funding Source: National Science Foundation
We report on the first global QCD analysis of the quark transversity distributions in the nucleon from semi-inclusive deep-inelastic scattering (SIDIS), using a new Monte Carlo method based on nested sampling and constraints on the isovector tensor charge g(T) from lattice QCD. A simultaneous fit to the available SIDIS Collins asymmetry data is compatible with g(T) values extracted from a comprehensive reanalysis of existing lattice simulations, in contrast to previous analyses, which found significantly smaller g(T) values. The contributions to the nucleon tensor charge from u and d quarks are found to be delta u = 0.3(2) and delta d = -0.7(2) at a scale Q(2) = 2 GeV2.
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