Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-02-18
Nucl.Phys. A670 (2000) 84-87
Physics
High Energy Physics
High Energy Physics - Phenomenology
Talk presented at the KEK-Tanashi International Conference "Physics of Hadrons and Nuclei", Dec. 14-17, 1998, Tokyo. 4 pages i
Scientific paper
10.1016/S0375-9474(00)00075-0
We present a leading order (LO) estimate for the longitidinal-transverse spin asymmetry (A_{LT}) in the nucleon-nucleon polarized Drell-Yan process at RHIC and HERA-$\vec{N}$ energies in comparison with A_{LL} and A_{TT}. A_{LT} receives contribution from g_1, the transversity ditribution h_1, and the twist-3 distributions g_T and h_L. For the twist-3 contribution we use the bag model prediction evolved to a high energy scale by the large-N_c evolution equation. We found that A_{LT} (normalized by the asymmetry in the parton level) is much smaller than the corresponding A_{TT}. Twist-3 contribution given by the bag model also turned out to be negligible.
Kanazawa Y.
Koike Yuji
Nishiyama Norimasa
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