QCD SUM-RULE AND PERTURBATIVE QCD APPROACHES TO PION COMPTON-SCATTERING

被引：15
|
作者：
CORIANO, C
LI, HN
机构：
[1] INFN,GRP COLLEGATO PARMA,PARMA,ITALY
[2] ACAD SINICA,INST PHYS,TAIPEI 11529,TAIWAN
[3] UNIV PARMA,DIPARTIMENTO FIS,I-43100 PARMA,ITALY
来源：
PHYSICS LETTERS B | 1993年 / 309卷 / 3-4期
关键词：
D O I：
10.1016/0370-2693(93)90954-G
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We compare two approaches to the description of pion Compton scattering at moderate momentum transfer, one being based on local duality QCD sum rules for the invariant amplitudes of the process, which have been derived recently, and the other on the modified factorization formula with Sudakov effects included. We find that perturbative QCD predictions are dominant over those from QCD sum rules only for the scattering angle greater than 40-degrees.
引用
收藏
页码：409 / 415
页数：7
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