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Title: Gluon fragmentation into P wave heavy quarkonium

Abstract

The fragmentation functions for gluons to split into P-wave heavy quarkonium states are calculated to leading order in the QCD coupling constant. Long-distance effects are factored into two nonperturbative parameters: the derivative of the radial wavefunction at the origin and a second parameter related to the probability for a heavy-quark-antiquark pair that is produced in a color-octet S-wave state to form a color-singlet P-wave bound state. The fragmentation probabilities for a high transverse momentum gluon to split into the P-wave charmonium states \chi_{c0}, \chi_{c1}, and \chi_{c2} are estimated to be 0.4 \times 10^{-4}, 1.8 \times 10^{-4}, and 2.4 \times 10^{-4}, respectively. This fragmentation process may account for a significant fraction of the rate for the inclusive production of \chi_{cJ} at large transverse momentum in p \bar p colliders.

Authors:
;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1155563
Report Number(s):
hep-ph/9403401
Journal ID: ISSN 0556-2821; PRVDAQ
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 50; Journal Issue: 5; Journal ID: ISSN 0556-2821
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Braaten, Eric, and Yuan, Tzu Chiang. Gluon fragmentation into P wave heavy quarkonium. United States: N. p., 1994. Web. doi:10.1103/PhysRevD.50.3176.
Braaten, Eric, & Yuan, Tzu Chiang. Gluon fragmentation into P wave heavy quarkonium. United States. doi:10.1103/PhysRevD.50.3176.
Braaten, Eric, and Yuan, Tzu Chiang. Tue . "Gluon fragmentation into P wave heavy quarkonium". United States. doi:10.1103/PhysRevD.50.3176. https://www.osti.gov/servlets/purl/1155563.
@article{osti_1155563,
title = {Gluon fragmentation into P wave heavy quarkonium},
author = {Braaten, Eric and Yuan, Tzu Chiang},
abstractNote = {The fragmentation functions for gluons to split into P-wave heavy quarkonium states are calculated to leading order in the QCD coupling constant. Long-distance effects are factored into two nonperturbative parameters: the derivative of the radial wavefunction at the origin and a second parameter related to the probability for a heavy-quark-antiquark pair that is produced in a color-octet S-wave state to form a color-singlet P-wave bound state. The fragmentation probabilities for a high transverse momentum gluon to split into the P-wave charmonium states \chi_{c0}, \chi_{c1}, and \chi_{c2} are estimated to be 0.4 \times 10^{-4}, 1.8 \times 10^{-4}, and 2.4 \times 10^{-4}, respectively. This fragmentation process may account for a significant fraction of the rate for the inclusive production of \chi_{cJ} at large transverse momentum in p \bar p colliders.},
doi = {10.1103/PhysRevD.50.3176},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 5,
volume = 50,
place = {United States},
year = {1994},
month = {3}
}