Chiral corrections to the vector and axial couplings of quarks and baryons

Journal Article · Sun Jun 01 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.114007· OSTI ID:21205070

Faessler, Amand; Gutsche, Thomas; Lyubovitskij, Valery E ^[1]; Holstein, Barry R ^[2]

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1. Institut fuer Theoretische Physik, Universitaet Tuebingen, Auf der Morgenstelle 14, D-72076 Tuebingen (Germany)
2. Department of Physics-LGRT, University of Massachusetts, Amherst, MA 01003 (United States)

We calculate chiral corrections to the semileptonic vector and axial quark coupling constants using a manifestly Lorentz covariant chiral quark approach up to order O(p{sup 4}) in the two- and three-flavor pictures. These couplings are then used in the evaluation of the corresponding couplings which govern the semileptonic transitions between octet baryon states. In the calculation of baryon matrix elements we use a general ansatz for the spatial form of the quark wave function, without referring to a specific realization of hadronization and confinement of quarks in baryons. Matching the physical amplitudes calculated within our approach to the model-independent predictions of baryon chiral perturbation theory allows us to deduce a connection between our parameters and those of baryon chiral perturbation theory.

• OSTI ID: 21205070
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 77; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
BARYONS
CHIRALITY
CONFINEMENT
CORRECTIONS
COUPLING
COUPLING CONSTANTS
FLAVOR MODEL
FORECASTING
MATRIX ELEMENTS
PERTURBATION THEORY
QUARKS
SEMILEPTONIC DECAY
WAVE FUNCTIONS