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Title: Signatures of color-octet quarkonium production

Abstract

Quarkonium spectroscopy, decay and production has provided scientists with an interesting place to test their ideas on QCD ever since charmonium was discovered in 1974. Yet, the potential of perturbative QCD (PQCD) to treat production and decay has been fully exploited only recently in a development comparable to that of Heavy Quark Effective Theory for heavy-light mesons. About the same time, experiments measuring quarkonium production at large transverse momentum have confronted theorists with surprisingly large cross sections. These observations have led to the understanding that fragmentation and hadronization of color-octet quark-antiquark (Q{anti Q}) pairs are essential in the production process. Color-octet mechanisms were considered in quarkonium decays already a while ago. They were found to solve the problem of infrared divergences in P-wave decays in a systematic way. Taking them into account also in S-wave production, where they are not required by perturbative consistency in leading order of a nonrelativistic expansion, opens the promise of a quantitative description of quarkonium production. The author briefly reviews the nonrelativistic QCD picture of quarkonium production and its confrontation with experiment in various production processes.

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, Menlo Park, CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
270832
Report Number(s):
SLAC-PUB-7173; CONF-9603183-2
ON: DE96013584; IN: HEP-PH/9605462; TRN: 96:017711
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: 2. workshop on continuous advances in QCD, Minneapolis, MN (United States), 28-31 Mar 1996; Other Information: PBD: May 1996
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; QUANTUM CHROMODYNAMICS; TESTING; PERTURBATION THEORY; QUARKONIUM; PARTICLE PRODUCTION; J PSI-3097 MESONS; INCLUSIVE INTERACTIONS; TRANSVERSE MOMENTUM; ELECTRON-POSITRON INTERACTIONS; Z NEUTRAL BOSONS; PROTON-ANTIPROTON INTERACTIONS; MATRIX ELEMENTS

Citation Formats

Beneke, M. Signatures of color-octet quarkonium production. United States: N. p., 1996. Web.
Beneke, M. Signatures of color-octet quarkonium production. United States.
Beneke, M. Wed . "Signatures of color-octet quarkonium production". United States. https://www.osti.gov/servlets/purl/270832.
@article{osti_270832,
title = {Signatures of color-octet quarkonium production},
author = {Beneke, M},
abstractNote = {Quarkonium spectroscopy, decay and production has provided scientists with an interesting place to test their ideas on QCD ever since charmonium was discovered in 1974. Yet, the potential of perturbative QCD (PQCD) to treat production and decay has been fully exploited only recently in a development comparable to that of Heavy Quark Effective Theory for heavy-light mesons. About the same time, experiments measuring quarkonium production at large transverse momentum have confronted theorists with surprisingly large cross sections. These observations have led to the understanding that fragmentation and hadronization of color-octet quark-antiquark (Q{anti Q}) pairs are essential in the production process. Color-octet mechanisms were considered in quarkonium decays already a while ago. They were found to solve the problem of infrared divergences in P-wave decays in a systematic way. Taking them into account also in S-wave production, where they are not required by perturbative consistency in leading order of a nonrelativistic expansion, opens the promise of a quantitative description of quarkonium production. The author briefly reviews the nonrelativistic QCD picture of quarkonium production and its confrontation with experiment in various production processes.},
doi = {},
url = {https://www.osti.gov/biblio/270832}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {5}
}

Conference:
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