Calculation ofP-wave charmonium decay rates using dimensional regularization

1997/01/07 by Eric Braaten, Yu-Qi Chen · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.55.7152

published as Phys.Rev. D55 (1997) 7152-7164 · 29 pages, LaTex, 5 figes

arxiv created 1997/01/07 · openalex publication_date 1997/06/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Contributions to the decay rates of P-wave charmonium states that are proportional to n_f\ensuremathα_s³, 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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