期刊
PHYSICAL REVIEW D
卷 89, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.89.074013
关键词
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资金
- U.S. Department of Energy, Office of Science
- LDRD program at LANL
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
- U.S. Department of Energy [DE-SC0008745]
- Spanish MECD [FPA2011-27853-CO2-02]
- U.S. Department of Energy (DOE) [DE-SC0008745] Funding Source: U.S. Department of Energy (DOE)
We study the QCD evolution of the Sivers effect in both semi-inclusive deep inelastic scattering (SIDIS) and Drell-Yan production (DY). We pay close attention to the nonperturbative spin-independent Sudakov factor in the evolution formalism and find a universal form which can describe reasonably well the experimental data on the transverse momentum distributions in SIDIS, DY lepton pair and W/Z production. With this Sudakov factor at hand, we perform a global fitting of all the experimental data on the Sivers asymmetry in SIDIS from HERMES, COMPASS and Jefferson Lab. We then make predictions for the Sivers asymmetry in DY lepton pair and W production that can be compared to the future experimental measurements to test the sign change of the Sivers functions between SIDIS and DY processes and constrain the sea quark Sivers functions.
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