Hyperon decay form factors in chiral perturbation theory
High Energy Physics - Phenomenology
2008-11-26 v2 High Energy Physics - Experiment
High Energy Physics - Lattice
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).
Keywords
Cite
@article{arxiv.0708.3957,
title = {Hyperon decay form factors in chiral perturbation theory},
author = {Andre Lacour and Bastian Kubis and Ulf-G. Meißner},
journal= {arXiv preprint arXiv:0708.3957},
year = {2008}
}
Comments
21 pages, 3 figures; discussion extended, references added, version published in JHEP