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arXiv · hep-ph/9910375

Chiral Symmetry Realization for Even- and Odd-parity Baryon Resonances

D. Jido·T. Hatsuda·T. Kunihiro
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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.

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D. Jido, T. Hatsuda, T. Kunihiro. 1999-10-18. Chiral Symmetry Realization for Even- and Odd-parity Baryon Resonances. https://doi.org/10.1103/physrevlett.84.3252

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