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ALT in the nucleon-nucleon polarized Drell-Yan process |
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| Authors: | Y. Kanazawa Yuji Koike N. Nishiyama |
| Affiliation: | a Graduate School of Science and Technology, Niigata University, Nigata 950-2181, Japan b Department of Physics, Niigata University, Niigata 950-2181, Japan |
| Abstract: | We present a leading order (LO) estimate for the longitidinal-transverse spin asymmetry (A) in the nucleon-nucleon polarized Drell-Yan process at RHIC and energies in comparison with A and A. A receives contribution from g1, the transversity distribution h1, and the twist-3 distributions g and h. For the twist-3 contribution we use the bag model prediction evolved to a high energy scale by the large-Nc evolution equation. We found that A (normalized by the asymmetry in the parton level) is much smaller than the corresponding A. Twist-3 contribution given by the bag model turned out to be negligible. |
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