Resonances in radiative hyperon decays
High Energy Physics - Phenomenology
2009-10-31 v1
Abstract
The importance of resonances for the radiative hyperon decays is examined in the framework of chiral perturbation theory. Low lying baryon resonances are included into the effective theory and tree contributions to these decays are calculated. We find significant contributions to both the parity-conserving and parity-violating decay amplitudes and a large negative value for the asymmetry parameter in polarized Sigma^+ -> p gamma is found, in agreement with the experimental result alpha(p Sigma^+) = -0.76 +/- 0.08.
Cite
@article{arxiv.hep-ph/9902431,
title = {Resonances in radiative hyperon decays},
author = {B. Borasoy and B. R. Holstein},
journal= {arXiv preprint arXiv:hep-ph/9902431},
year = {2009}
}
Comments
14 pages, 2 figures