POWER CORRECTIONS TO QCD SUM-RULES FOR COMPTON-SCATTERING

被引：6
作者：
CORIANO, C
机构：
[1] Institute for Theoretical Physics, University of Stockholm, 113 85 Stockholm
来源：
NUCLEAR PHYSICS B | 1993年 / 410卷 / 01期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/0550-3213(93)90574-9
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We extend previous work on sum rules for the invariant amplitudes of pion Compton scattering by deriving a complete lowest-order perturbative spectral function - and its leading non-perturbative power corrections - for a specific combination of the two helicities (H-1 + H-2) of this process. Using some properties of a modified version of the Borel transform, we develop a method of calculation of the gluonic corrections which can be easily extended to other similar reactions, such as proton Compton scattering. A preliminary comparison of the new sum rule with the pion form factor sum rule is made.
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页码：90 / 114
页数：25
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