Heavy-quark self-energy in nonrelativistic lattice QCD

Journal Article · Wed Sep 01 04:00:00 EDT 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.48.2265· OSTI ID:6277541

Morningstar, C J ^[1]

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1. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)

The heavy-quark self-energy in nonrelativistic lattice QCD is calculated to [ital O]([alpha][sub [ital s]]) in perturbation theory. The heavy-quark action includes all spin-independent relativistic corrections to order [ital v][sup 2], where [ital v] is the typical heavy-quark velocity, and all spin-dependent corrections to order [ital v][sup 4]. The standard Wilson action and an improved multiplaquette action are used for the gluons. Results for the mass renormalization, wave function renormalization, and energy shift are given; tadpole contributions are found to be large. A tadpole improvement scheme in which all link variables are rescaled by a mean-field factor is also studied. The effectiveness of this scheme in offsetting the large tadpole contributions to the heavy-quark renormalization parameters is demonstrated.

• DOE Contract Number: AC03-76SF00515
• OSTI ID: 6277541
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 48:5; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662110 -- General Theory of Particles & Fields-- Theory of Fields & Strings-- (1992-)
662230* -- Quantum Chromodynamics-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
ELEMENTARY PARTICLES
ENERGY
FERMIONS
FIELD THEORIES
FUNCTIONS
GLUONS
LATTICE FIELD THEORY
MASS RENORMALIZATION
MEAN-FIELD THEORY
PERTURBATION THEORY
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKS
RENORMALIZATION
SELF-ENERGY
WAVE FUNCTIONS