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arXiv · 1811.11738

Description of the $Ξ_c$ and $Ξ_b$ states as molecular states

Q. X. Yu·R. Pavao·V. R. Debastiani·E. Oset
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Abstract

In this work we study several $Ξ_c$ and $Ξ_b$ states dynamically generated from the meson-baryon interaction in coupled channels, using an extension of the local hidden gauge approach in the Bethe-Salpeter equation. These molecular states appear as poles of the scattering amplitudes, and several of them can be identified with the experimentally observed $Ξ_c$ states, including the $Ξ_c(2790)$, $Ξ_c(2930)$, $Ξ_c(2970)$, $Ξ_c(3055)$ and $Ξ_c(3080)$. Also, for the recently reported $Ξ_b(6227)$ state, we find two poles with masses and widths remarkably close to the experimental data, for both the $J^P=1/2^-$ and $J^P=3/2^-$ sectors.

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Q. X. Yu, R. Pavao, V. R. Debastiani, E. Oset. 2018-11-28. Description of the $Ξ_c$ and $Ξ_b$ states as molecular states. https://doi.org/10.1140/epjc%2Fs10052-019-6665-z

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