NUCLEON COMPTON-SCATTERING IN PERTURBATIVE QCD

被引：59
|
作者：
KRONFELD, AS [1 ]
NIZIC, B [1 ]
机构：
[1] RUDJER BOSKOVIC INST, YU-41001 ZAGREB, CROATIA
来源：
PHYSICAL REVIEW D | 1991年 / 44卷 / 11期
关键词：
D O I：
10.1103/PhysRevD.44.3445
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have computed the helicity amplitudes for the reactions gamma-N --> gamma-N (N = p,n) at large momentum transfer to lowest order in perturbative QCD. Our cross section for proton Compton scattering shows good qualitative agreement with experimental data, when the proton is modeled by the Chernyak-Oglobin-Zhitnitsky, King-Sachrajda, or Gari-Stefanis distribution amplitude. Discrepancies between our results and previous calculations seem to be due to different treatments of numerical integration around singularities.
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页码：3445 / 3465
页数：21
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