Chiral Symmetry Realization for Even- and Odd-parity Baryon Resonances
High Energy Physics - Phenomenology
2011-07-19 v1 Nuclear Theory
Abstract
Baryon resonances with even and odd parity are collectively investigated from the viewpoint of chiral symmetry(ChS). We propose a quartet scheme where Delta's and N^*'s with even and odd parity form a chiral multiplet. This scheme gives parameter-free constraints on the baryon masses in the quartet, which are consistent with observed masses with spin 1/2, 3/2, 5/2. The scheme also gives selection rules in the one-pion decay: The absence of the parity non-changing decay N(1720) -> pi Delta(1232) is a typical example which should be confirmed experimentally to unravel the role of ChS in baryon resonances.
Cite
@article{arxiv.hep-ph/9910375,
title = {Chiral Symmetry Realization for Even- and Odd-parity Baryon Resonances},
author = {D. Jido and T. Hatsuda and T. Kunihiro},
journal= {arXiv preprint arXiv:hep-ph/9910375},
year = {2011}
}
Comments
4 pages, 1 eps figure, REVTeX