CALCULATION OF P-WAVE CHARMONIUM DECAY-RATES USING DIMENSIONAL REGULARIZATION

Authors
BRAATEN E CHEN YQ
Citation
E. Braaten et Yq. Chen, CALCULATION OF P-WAVE CHARMONIUM DECAY-RATES USING DIMENSIONAL REGULARIZATION, Physical review. D. Particles and fields, 55(11), 1997, pp. 7152-7164
Citations number
12
Categorie Soggetti
Physics, Particles & Fields
Journal title
Physical review. D. Particles and fields → ACNP
ISSN journal
05562821
Volume
55
Issue
11
Year of publication
1997
Pages
7152 - 7164
Database
ISI
SICI code
0556-2821(1997)55:11<7152:COPCDU>2.0.ZU;2-5
Abstract
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 QC D using the threshold expansion method. Dimensional regularization is used to regularize the infrared divergences that arise from the emissi on of a soft gluon. Our results are consistent with the original calcu lations of Barbieri ct al.