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Chiral Unitary Approach To The N*N*pi, N*N*eta Couplings For The N*(1535) Resonance | | J.C. Nacher
; A. Parreno
; E. Oset
; A. Ramos
; A. Hosaka
; M. Oka
; | | Date: |
8 Jun 1999 | | Journal: | Nucl.Phys. A678 (2000) 187-211 | | Subject: | nucl-th | | Affiliation: | Valencia U.), A. Parreno (Washington U.), E. Oset (Valencia U.), A. Ramos (Barcelona U.), A. Hosaka (Numazu Coll. of Tech.), M. Oka (Tokyo Inst. of Tech. | | Abstract: | Using a chiral unitary model in which the negative parity nucleon resonance $N^ast equiv N^ast(1535)$ is generated dynamically by means of the Bethe Salpeter equation with coupled meson baryon channels in the $S = 0$ sector, we have obtained the $pi^0 N^ast N^ast$ and $eta N^ast N^ast$ couplings. The $pi^0 N^ast N^ast$ coupling has smaller strength and the same sign as the $pi^0 N N$ coupling. This rules out the mirror assignment of chiral symmetry where the ground state nucleon $N$ and the negative parity resonance $N^ast$ are envisaged as chiral partners in the baryon sector. | | Source: | arXiv, nucl-th/9906018 | | Services: | Forum | Review | PDF | Favorites | |
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