Regular Article - Theoretical Physics
Left–right asymmetry for pion and kaon production in the semi-inclusive deep-inelastic scattering process
School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, 100871, China
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Revised: 9 September 2009
Published online: 12 November 2009
We analyze the left–right asymmetry in the semi-inclusive deep-inelastic scattering (SIDIS) process without introducing any weighting functions. With the current theoretical understanding, we find that the Sivers effect plays a key role in our analysis. We use the latest parametrization of the Sivers and fragmentation functions to reanalyze the π ± production process and find that the results are sensitive to the parametrization. We also extend our calculation on the K ± production, which can help us know more about the Sivers distribution of the sea quarks and the unfavored fragmentation processes. HERMES kinematics with a proton target, COMPASS kinematics with a proton, deuteron, and neutron target (the information on the neutron target can be effectively extracted from the 3He target), and JLab kinematics (both 6 GeV and 12 GeV) with a proton and neutron target are considered in our paper.
© Springer-Verlag , 2010