States generated in the $K$-multi-$\rho$ interactions

Abstract

In the present work we use three-body interaction formalism to investigate the $K$-multi-$\rho$ interactions. First, we reproduced the resonances $f_2(1270)$ and $K_1(1270)$ in the $\rho \rho$ and $\rho K$ two-body interactions respectively, as the clusters of the fixed center approximation. Then, we study the three-body $K-\rho \rho (f_2)$ and $\rho -\rho K(K_1)$ interactions with the fixed center approximation of the Faddeev equations. Furthermore, we extrapolate the formalism to study the four-body, five-body and six-body systems, containing one $K$ meson and multi-$\rho$ mesons. In our research, without introducing any free parameters, we generate the $K_2(1770)$ state in the three-body interaction with the mass of 1707 MeV and a width about 113 MeV, which are consistent with the experiments. We also find a clear resonant structure in our results of the five-body interaction, with a mass 2505 MeV and a width about 32 MeV or more, which is associated to the $K_4(2500)$ state, where we obtain consistent results with the experimental findings. Furthermore, we predict some new states in the other many body interactions, $K_3(2080)$, $K_5(2670)$ (isospin $I=1/2$), and $K_4(2640)$ (isospin $I=3/2$), with uncertainties.

Updated version: comments and references added, accepted by PRD

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• Possible bound states with hidden bottom from ${\bar{K}}^{(\ast )}{B}^{(\ast )}{\bar{B}}^{(\ast )}$ systems
• Investigations of the $D$-multi-$\rho$ interactions