Soft gluon emission process in the color-octet model for heavy quarkonium production
Journal Article
·
· Physical Review. D, Particles Fields
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
The color-octet model has been used successfully to analyze many problems in heavy quarkonium production. We examine some of the conceptual and practical problems of the soft gluon emission process in the color-octet model. We use a potential model to describe the initial and final states in the soft gluon emission process, as the emission occurs at a late stage, after the production of the heavy quark pair. It is found in this model that the soft gluon M1 transition {sup 1}S{sub 0}{sup (8)}{yields}{sup 3}S{sub 1}{sup (1)} dominates over the E1 transition {sup 3}P{sub J}{sup (8)}{yields}{sup 3}S{sub 1}{sup (1)} for J/{psi} and {psi}{sup '} production. Such a dominance may help resolve the questions of isotropic polarization and color-octet matrix element universality in the color-octet model. (c) 1999 The American Physical Society.
- OSTI ID:
- 20218039
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 60; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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