Three body systems with strangeness and exotic systems

Abstract

We report on four $\Sigma$'s and three $\Lambda$'s, in the 1500 - 1800 MeV region, as two meson - one baryon S-wave $(1/2{)}^{+}$ resonances found by solving the Faddeev equations in the coupled channel approach, which can be associated to the existing $S$ = -1, $J^P=1/2^{+}$ low lying baryon resonances. On the other hand we also report on a new, hidden strangeness $N^{\ast }$ state, mostly made of $K\bar{K}N$, with mass around 1920 MeV, which we think could be responsible for the peak seen in the $\gamma p\to K^{+}\Lambda$ around this energy. Finally we address a very novel topic in which we show how few body systems of several $\rho$ mesons can be produced, with their spins aligned up to J=6, and how these states found theoretically can be associated to several known mesons with spins J=2,3,4,5,6.

Talk at the 21st European Conference on Few Body Problems in Physics, Salamanca, Sep. 2010

References in corpus (8)

• Vector meson-vector meson interaction in a hidden gauge unitary approach
• K^- p scattering length from scattering experiments
• The ρρinteraction in the hidden gauge formalism and the f_0(1370) and f_2(1270) resonances
• X(2175) as a resonant state of the $\varphi K\bar{K}$ system
• Three body resonances in two meson-one baryon systems
• K anti-K N molecule state with I=1/2 and J^P=1/2^+ studied with three-body calculation
• Solution to Faddeev equations with two-body experimental amplitudes as input and application to J^P=1/2^+, S=0 baryon resonances
• The $\sigma K$ coupling in the chiral unitary approach and the isoscalar $\bar{K}N$, $\bar{K}A$ interaction