Two-spin asymmetry for ψ′ photoproduction with the color-octet mechanism -: art. no. 057501

被引：0
|
作者：
Sudoh, K [1 ]
Morii, T
机构：
[1] Kobe Univ, Fac Human Dev, Kobe, Hyogo 6578501, Japan
[2] Kobe Univ, Grad Sch Sci & Technol, Kobe, Hyogo 6578501, Japan
来源：
PHYSICAL REVIEW D | 2000年 / 62卷 / 05期
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the photoproduction of psi' in the forward regions in polarized gamma p collisions at relevant (DESY) HERA energies. We find that this reaction is very effective to test the color-octet mechanism which is based on the NRQCD factorization formalism. Furthermore we find that the value of the NRQCD matrix elements can be severely constrained by measuring the two-spin asymmetry, though the process depends on the polarized gluon distribution Delta g(x).
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