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Probing chiral symmetry of nucleon by threshold $ηπ$ production

Daisuke Jido·Atsushi Hosaka·Makoto Oka
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Abstract

Double meson production of the eta and pion at the threshold region is investigated in order to determine chiral property of the nucleon. The eta can be used as a probe for the negative parity nucleon $N^* \equiv N^*(1535)$ produced in the intermediate state. The coupling of the low energy pion in the final state is then used to extract the sign of the Yukawa coupling, $\gpRR$, which distinguishes the two realizations of chiral symmetry, either naive or mirror, for the nucleon.

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Daisuke Jido, Atsushi Hosaka, Makoto Oka. 2000-07-13. Probing chiral symmetry of nucleon by threshold $ηπ$ production. https://arxiv.org/abs/hep-ph/0007127

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