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Title: Soft gluon emission process in the color-octet model for heavy quarkonium production

Abstract

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.

Authors:
 [1]
  1. Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
Publication Date:
OSTI Identifier:
20218039
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 60; Journal Issue: 11; Other Information: PBD: 1 Dec 1999; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; HADRON-HADRON INTERACTIONS; GLUONS; COLOR MODEL; QUARKONIUM; J PSI-3097 MESONS; QUANTUM CHROMODYNAMICS; MATRIX ELEMENTS; PARTON MODEL; THEORETICAL DATA

Citation Formats

Wong, Cheuk-Yin. Soft gluon emission process in the color-octet model for heavy quarkonium production. United States: N. p., 1999. Web. doi:10.1103/PhysRevD.60.114025.
Wong, Cheuk-Yin. Soft gluon emission process in the color-octet model for heavy quarkonium production. United States. https://doi.org/10.1103/PhysRevD.60.114025
Wong, Cheuk-Yin. Wed . "Soft gluon emission process in the color-octet model for heavy quarkonium production". United States. https://doi.org/10.1103/PhysRevD.60.114025.
@article{osti_20218039,
title = {Soft gluon emission process in the color-octet model for heavy quarkonium production},
author = {Wong, Cheuk-Yin},
abstractNote = {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.},
doi = {10.1103/PhysRevD.60.114025},
url = {https://www.osti.gov/biblio/20218039}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 11,
volume = 60,
place = {United States},
year = {1999},
month = {12}
}