Gluon fragmentation into [ital P]-wave heavy quarkonium

Journal Article · Thu Sep 01 04:00:00 EDT 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.50.3176· OSTI ID:7142650

Braaten, E ^[1]; Yuan, T C ^[2]

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1. Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510 (United States)
2. Davis Institute for High Energy Physics, Department of Physics, University of California, Davis, California 95616 (United States)

The fragmentation functions for gluons to split into [ital 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 wave function at the origin and a second parameter related to the probability for a heavy-quark--antiquark pair that is produced in a color-octet [ital S]-wave state to form a color-singlet [ital P]-wave bound state. The fragmentation probabilities for a high transverse momentum gluon to split into the [ital P]-wave charmonium states [chi][sub [ital c]0], [chi][sub [ital c]1], and [chi][sub [ital c]2] are estimated to be 0.4[times]10[sup [minus]4], 1.8[times]10[sup [minus]4], and 2.4[times]10[sup [minus]4], respectively. This fragmentation process may account for a significant fraction of the rate for the inclusive production of [chi][sub [ital c][ital J]] at large transverse momentum in [ital p[bar p]] colliders.

• DOE Contract Number: FG02-91ER40684; FG03-91ER40674
• OSTI ID: 7142650
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 50:5; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

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662340* -- Hadron Interactions-- (1992-)
662420 -- Properties of Mesons & Meson Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
BOUND STATE
COLOR
COUPLING CONSTANTS
ELEMENTARY PARTICLES
FIELD THEORIES
FRAGMENTATION
FUNCTIONS
GLUONS
LINEAR MOMENTUM
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
P WAVES
PARTIAL WAVES
PHYSICAL PROPERTIES
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKONIUM
TRANSVERSE MOMENTUM
WAVE FUNCTIONS