Complete one-loop corrections to large-transverse-momentum direct photon production by a polarized photon beam and polarized target are determined. A prescription for defining polarized quark and gluon density matrices within dimensional regularization is given. K factors and polarization asymmetries are presented. It is shown that →γ→p→γ+X, can be used to test our information on the polarized quark and gluon distributions.
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Contogouris et al. (1992) studied this question.
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