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Nácher Díez, José Carlos; Parreño García, Assumpta; Oset Báguena, Eulogio; Ramos Gómez, Àngels; Hosaka, Atsushi; Oka, M. | |||
Aquest document és un/a article, creat/da en: 2000 | |||
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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 π0N∗N∗ and ηN∗N∗ couplings. The π0N∗N∗ coupling has smaller strength and the same sign as the π0NN 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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