SU(3)-breaking corrections to the hyperon vector coupling f{sub 1}(0) in covariant baryon chiral perturbation theory

Journal Article · Fri May 01 00:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.094022· OSTI ID:21308426

Geng, L S; Camalich, J Martin; Vacas, M J. Vicente ^[1]

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1. Departamento de Fisica Teorica and IFIC, Universidad de Valencia-CSIC, E-46071 Valencia (Spain)

We calculate the SU(3)-breaking corrections to the hyperon vector coupling f{sub 1}(0) up to O(p{sup 4}) in covariant baryon chiral perturbation theory with dynamical octet and decuplet contributions. We find that the decuplet contributions are of similar or even larger size than the octet ones. Combining both, we predict positive SU(3)-breaking corrections to all the four independent f{sub 1}(0)'s (assuming isospin symmetry), which are consistent, within uncertainties, with the latest results from large N{sub c} fits, chiral quark models, and quenched lattice QCD calculations.

• OSTI ID: 21308426
• Journal Information: Physical Review. D, Particles Fields, Vol. 79, Issue 9; Other Information: DOI: 10.1103/PhysRevD.79.094022; (c) 2009 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
CHIRALITY
CORRECTIONS
COUPLING
HYPERONS
ISOSPIN
PERTURBATION THEORY
QUANTUM CHROMODYNAMICS
QUARK MODEL
SIMULATION
SU-3 GROUPS
SYMMETRY
SYMMETRY BREAKING