Calculation of P-wave charmonium decay rates using dimensional regularization

被引:19
作者
Braaten, E
Chen, YQ
机构
[1] Department of Physics, Ohio State University, Columbus, OH
关键词
D O I
10.1103/PhysRevD.55.7152
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Contributions to the decay rates of P-wave charmonium states that are proportional to n(f) alpha(s)(3), where n(f) is the number of flavors of light quarks, are calculated in the framework of nonrelativistic QCD using the threshold expansion method. Dimensional regularization is used to regularize the infrared divergences that arise from the emission of a soft gluon. Our results are consistent with the original calculations of Barbieri ct al.
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页码:7152 / 7164
页数:13
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