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Chiral unitary approach to the πN∗N∗ , ηN∗N∗ couplings for the N∗(1535) resonance

✍ Scribed by J.C. Nacher; A. Parreño; E. Oset; A. Ramos; A. Hosaka; M. Oka

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
282 KB
Volume
678
Category
Article
ISSN
0375-9474

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✦ Synopsis

Using a chiral unitary model in which the negative parity nucleon resonance N * ≡ N * (1535) is generated dynamically by means of the Bethe-Salpeter equation with coupled meson-baryon channels in the S = 0 sector, we have obtained the π 0 N * N * and ηN * N * couplings. The π 0 N * N * coupling has smaller strength but the same sign as the π 0 NN coupling. This rules out the mirror assignment of chiral symmetry where the ground state nucleon N and the negative parity resonance N * are envisaged as chiral partners in the baryon sector.

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