305 research outputs found
Three body resonances in two meson-one baryon systems
We report four 's and three 's, in the 1500 - 1800 MeV
region, as two meson - one baryon S-wave 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 -matrix have been found very close to the existing
= -1, low lying baryon resonances. The input two-body
-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.Comment: corrected version, new channels evaluated, new references adde
Solution to Faddeev equations with two-body experimental amplitudes as input and application to J^P=1/2^+, S=0 baryon resonances
We solve the Faddeev equations for the two meson-one baryon system
and coupled channels using the experimental two-body -matrices for the interaction as input and unitary chiral dynamics to describe the interaction
between the rest of coupled channels. In addition to the obtained
before with the channel, we obtain, for and total
isospin of the three-body system , a resonance peak whose mass is around
2080 MeV and width of 54 MeV, while for we find a peak around 2126 MeV
and 42 MeV of width. These two resonances can be identified with the and the , respectively. We obtain another peak in the
isospin 1/2 configuration, around 1920 MeV which can be interpreted as a
resonance in the and systems.Comment: published versio
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