Bethe-Salpeter equation for doubly heavy baryons in the covariant instantaneous approximation

Journal Article · Tue Mar 01 04:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.056006· OSTI ID:21537464

Weng, M -H ^[1]; Guo, X -H ^[1]; Thomas, A W ^[2]

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1. College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875 (China)
2. CSSM, School of Chemistry and Physics, University of Adelaide, Adelaide SA 5005 (Australia)

In the heavy quark limit, a doubly heavy baryon is regarded as composed of a heavy diquark and a light quark. We establish the Bethe-Salpeter equations for the heavy diquarks and the doubly heavy baryons, respectively, to leading order in a 1/m{sub Q} expansion. The Bethe-Salpeter equations are solved numerically under the covariant instantaneous approximation with the kernels containing scalar confinement and one-gluon-exchange terms. The masses for the heavy diquarks and the doubly heavy baryons are obtained, and the nonleptonic decay widths for the doubly heavy baryons emitting a pseudoscalar meson are calculated within the model.

• OSTI ID: 21537464
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 83; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
APPROXIMATIONS
BARYONS
BETHE-SALPETER EQUATION
BOSONS
CALCULATION METHODS
DECAY
ELEMENTARY PARTICLES
EQUATIONS
EXPANSION
FERMIONS
GLUONS
HADRONS
MASS
MESONS
PARTICLE DECAY
PSEUDOSCALAR MESONS
QUARKS
WEAK HADRONIC DECAY
WEAK PARTICLE DECAY