Spin correlations and velocity scaling in color-octet nonrelativistic QCD matrix elements

Journal Article · Fri Jul 01 00:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.014009· OSTI ID:20711051

Bodwin, Geoffrey T; Sinclair, D K ^[1]; Lee, Jungil ^[2]

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1. High Energy Physics Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 (United States)
2. Department of Physics, Korea University, Seoul 136-701 (Korea, Republic of)

We compute spin-dependent decay matrix elements for S-wave charmonium and bottomonium in lattice nonrelativistic quantum chromodynamics (NRQCD). Particular emphasis is placed upon the color-octet matrix elements, since the corresponding production matrix elements are expected to appear in the dominant contributions to the production cross sections at large transverse momenta. We use three slightly different versions of the heavy-quark lattice Green's functions in order to minimize the contributions that scale as powers of the ultraviolet cutoff. The lattice matrix elements that we calculate obey the hierarchy that is suggested by the velocity-scaling rules of NRQCD.

• OSTI ID: 20711051
• Journal Information: Physical Review. D, Particles Fields, Vol. 72, Issue 1; Other Information: DOI: 10.1103/PhysRevD.72.014009; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B QUARKS
BOTTOMONIUM
CHARMONIUM
COLOR MODEL
CORRELATIONS
GREEN FUNCTION
HADRONIC PARTICLE DECAY
LATTICE FIELD THEORY
MATRIX ELEMENTS
PARTICLE MULTIPLETS
QUANTUM CHROMODYNAMICS
RESONANCE PARTICLES
S WAVES
SPIN
TRANSVERSE MOMENTUM
ULTRAVIOLET DIVERGENCES