[ital Z][sup 0] decay into charmonium via charm quark fragmentation

Journal Article · Mon Nov 01 04:00:00 EST 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.48.4230· OSTI ID:5970207

Braaten, E; Cheung, K ^[1]; Yuan, T C ^[2]

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1. Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208 (United States)
2. Davis Institute for High Energy Physics, Department of Physics, University of California, Davis, California 95616 (United States)

In decays of the [ital Z][sup 0], the dominant mechanism for the direct production of charmonium states is the decay of the [ital Z][sup 0] into a charm quark or antiquark followed by its fragmentation into the charmonium state. We calculate the fragmentation functions describing the splitting of charm quarks into [ital S]-wave charmonium states to leading order in the QCD coupling constant. Leading logarithms of [ital M][sub [ital Z]]/[ital m][sub [ital c]] are summed up using Altarelli-Parisi evolution equations. Our analytic result agrees with the complete leading order calculation of the rate for [ital Z][sup 0][r arrow][psi][ital c[bar c]]. We also use our fragmentation functions to calculate the production rate of heavy quarkonium states in [ital W][sup [plus minus]], top quark, and Higgs boson decays.

• DOE Contract Number: FG02-91ER40684
• OSTI ID: 5970207
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 48:9; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662230 -- Quantum Chromodynamics-- (1992-)
662380* -- Decays of Intermediate Bosons-- (1992-)
662420 -- Properties of Mesons & Meson Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CHARM PARTICLES
CHARMONIUM
COUPLING CONSTANTS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FRAGMENTATION
HADRONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
MESONS
PARTIAL WAVES
PARTICLE DECAY
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKONIUM
QUARKS
S WAVES
Z NEUTRAL BOSONS