6533b82bfe1ef96bd128cd0c
RESEARCH PRODUCT
Three-body resonances in two-meson-one-baryon systems
A. Martínez TorresEulogi OsetK. P. Khemchandanisubject
PhysicsNuclear and High Energy PhysicsParticle physicsFaddeev equationsBethe–Salpeter equationMesonNuclear TheoryHigh Energy Physics::LatticeHigh Energy Physics::PhenomenologyNuclear TheoryFOS: Physical sciencesFísicaFew-body systemsThree-body problemBaryonNuclear Theory (nucl-th)Invariant massHigh Energy Physics::ExperimentNuclear ExperimentS-matrixdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-06-15 |