Calculation of P-Wave Charmonium Decay Rates Using Dimensional Regularization

Details Calculation of P-Wave Charmonium Decay Rates Using Dimensional Regularization Calculation of P-Wave Charmonium Decay Rates Using Dimensional Regularization

1997-01-07

arxiv.org/abs/hep-ph/9701242v1

Phys.Rev. D55 (1997) 7152-7164

Physics

High Energy Physics

High Energy Physics - Phenomenology

29 pages, LaTex, 5 figes

Scientific paper

10.1103/PhysRevD.55.7152

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 et al.

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