Hyperon decay form factors in chiral perturbation theory

Details Hyperon decay form factors in chiral perturbation theory Hyperon decay form factors in chiral perturbation theory

2007-08-29

arxiv.org/abs/0708.3957v2

JHEP0710:083,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1088/1126-6708/2007/10/083

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).

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