Three body resonances in two meson-one baryon systems

Details Three body resonances in two meson-one baryon systems Three body resonances in two meson-one baryon systems

2007-06-15

arxiv.org/abs/0706.2330v2

Phys.Rev.C77:042203,2008

Physics

Nuclear Physics

Nuclear Theory

corrected version, new channels evaluated, new references added

Scientific paper

10.1103/PhysRevC.77.042203

We report four $\Sigma$'s and three $\Lambda$'s, in the 1500 - 1800 MeV region, as two meson - one baryon S-wave $(1/2)^+$ resonances. We solve Faddeev equations in the coupled channel approach. The invariant mass of one of the meson-baryon pairs and that of the three particles have been varied and peaks in the squared three body $T$-matrix have been found very close to the existing $S$ = -1, $J^P= 1/2^+$ low lying baryon resonances. The input two-body $t$-matrices for meson-meson and meson-baryon interaction have been calculated by solving the Bethe-Salpeter equation with the potentials obtained in the chiral unitary approach.

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