Exotic $\hat{I}{\text{c◯}}_c^0$ baryons from meson-baryon scattering

Abstract

A meson-baryon interaction in the charm $+1$, strangeness $-2$ and isospin $0$ sector is built from a t-channel vector meson exchange model employing effective Lagrangians. The implementation of coupled-channel unitarization in the s-wave scattering amplitudes gives rise to two structures that have similar masses and widths to those of the $\hat{I}{\text{c◯}}_c(3050{)}^0$ and $\hat{I}{\text{c◯}}_c(3090{)}^0$ states recently observed by the LHCb collaboration. A meson-baryon molecular interpretation of these resonances would assign their spin-parity to be $J^P=1/2^{-}$.

Proceedings of the talk by G. Montana at BEACH2018 - XIII International Conference on Beauty, Charm and Hyperon Hadrons in Peniche, Portugal, 17-23 June 2018; 5 pages, 1 figure, 2 tables. arXiv admin note: substantial text overlap with arXiv:1812.03898