Single-spin asymmetry in deeply virtual Compton scattering: Fragmentation region of polarized lepton

被引：2
|
作者：
Akushevich, I
Kuraev, EA [1 ]
Shaikhatdenov, BG
机构：
[1] N Carolina Cent Univ, Durham, NC 27707 USA
[2] TJNAF, Newport News, VA 23606 USA
[3] Joint Inst Nucl Res, Dubna 141980, Russia
来源：
PHYSICAL REVIEW D | 2001年 / 64卷 / 09期
关键词：
D O I：
10.1103/PhysRevD.64.094010
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
For the kinematical region when a hard photon is emitted predominantly close to the direction of motion of a longitudinally polarized initial electron and relatively small momentum is transferred to a proton we calculate the azimuthal asymmetry of photon emission. It arises from the interference of the Bethe-Heitler amplitude and amplitudes described by a heavy photon impact factor. Azimuthal asymmetry does not decrease in the limit of infinite c.m.s. energy. The lowest order expression for the impact factor of a heavy photon is presented.
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页数：8
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