Quarkonium Decay Matrix Elements from Quenched Lattice QCD

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.77.2376· OSTI ID:383874

Bodwin, G T; Sinclair, D K ^[1]; Kim, S ^[2]

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1. HEP Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (United States)
2. Center for Theoretical Physics, Seoul National University, Seoul (Korea)

We calculate the long-distance matrix elements for the decays of the lowest-lying {ital S}- and {ital P}-wave states of charmonium and bottomonium in quenched lattice QCD, using a nonrelativistic formulation for the heavy quarks. (The short-distance coefficients are known from perturbation theory.) In particular, we present the first calculation from QCD first principles of the color-octet contribution to {ital P}-wave decay{emdash}a contribution that is absent in potential models. We also give the relations between the lattice matrix elements and their continuum counterparts through one-loop order in perturbation theory. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 383874
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 77; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BOTTOMONIUM
CHARMONIUM
LATTICE FIELD THEORY
MATRIX ELEMENTS
P WAVES
PARTICLE DECAY
PERTURBATION THEORY
POTENTIALS
QUANTUM CHROMODYNAMICS
QUARKONIUM
S WAVES