Hyperon decay form factors in chiral perturbation theory

Abstract

We present a complete calculation of the SU(3)-breaking corrections to the hyperon vector form factors up to O(p^4) in covariant baryon chiral perturbation theory. Partial higher-order contributions are obtained, and we discuss chiral extrapolations of the vector form factor at zero momentum transfer. In addition we derive low-energy theorems for the subleading moments in hyperon decays, the weak Dirac radii and the weak anomalous magnetic moments, up to O(p^4).

21 pages, 3 figures; discussion extended, references added, version published in JHEP

References in corpus (6)

• Chiral Perturbation Theory and Baryon Properties
• Chiral perturbation theory
• Chiral Extrapolations and the Covariant Small Scale Expansion
• Measurement of the branching ratios of the decays Xi0 --> Sigma+ e- nubar and anti-Xi0 --> anti-Sigma+ e+ nu
• Strange form factors and Chiral Perturbation Theory
• SU(3) breaking effects in hyperon beta decay from lattice QCD

Cited by in corpus (5)

• Lattice study of flavor SU(3) breaking in hyperon beta decay
• Hyperons in Two Flavor Chiral Perturbation Theory
• Tests of non-standard electroweak couplings of right-handed quarks
• SU(3)-breaking corrections to the hyperon vector coupling $f_1(0)$ in covariant baryon chiral perturbation theory
• Chiral corrections to the vector and axial couplings of quarks and baryons