Effective QCD coupling and power corrections to photon-photon scattering

被引：8
|
作者：
Hautmann, F [1 ]
机构：
[1] Univ Oregon, Inst Theoret Sci, Eugene, OR 97403 USA
[2] Brookhaven Natl Lab, High Energy Theory Grp, Upton, NY 11973 USA
[3] RIKEN, BNL Res Ctr, Wako, Saitama, Japan
来源：
PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 15期
关键词：
D O I：
10.1103/PhysRevLett.80.3198
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The scattering of two off-shell photons is an infrared-safe process in QCD. For photon virtualities Q in the range of a few GeV, accessible at the CERN e(+)e(-) collider LEP II, power-behaved contributions in (Lambda(QCD)/Q)(n) to the total cross section may become non-negligible. Based on a dispersion relation for the running coupling, we discuss these contributions and calculate the coefficients of the leading power correction for transversely polarized and longitudinally polarized virtual photons.
引用
收藏
页码：3198 / 3201
页数：4
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