Left-right asymmetry in semi-inclusive deep inelastic scattering process

Details Left-right asymmetry in semi-inclusive deep inelastic scattering process Left-right asymmetry in semi-inclusive deep inelastic scattering process

2008-08-07

arxiv.org/abs/0808.1004v1

Phys.Lett.B666:355-358,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 latex pages, 3 figures, to appear in PLB

Scientific paper

10.1016/j.physletb.2008.07.068

We analyze the left-right asymmetry of pion production in semi-inclusive deep inelastic scattering (SIDIS) process of unpolarized charged lepton on transversely polarized nucleon target. Unlike available treatments, in which some specific weighting functions are multiplied to separate theoretically motivated quantities, we do not introduce any weighting function following the analyzing method by the E704 experiment. The advantage is that this basic observable is free of any theoretical bias, although we can perform the calculation under the current theoretical framework. We present numerical calculations at both HERMES kinematics for the proton target and JLab kinematics for the neutron target. We find that with the current theoretical understanding, Sivers effect plays a key role in our analysis.

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