PoS - Proceedings of Science
Volume 310 - XVII International Conference on Hadron Spectroscopy and Structure (Hadron2017) - Posters
Hidden-charm meson-baryon molecules with a short-range attraction from five quark states
Y. Yamaguchi
Full text: pdf
Pre-published on: February 19, 2018
Published on: March 20, 2018
Abstract
We investigate the exotic baryons as
$\bar{D}^{(\ast)}\Lambda_{\rm c}$ and $\bar{D}^{(\ast)}\Sigma^{(\ast)}_{\rm c}$ molecules coupled to the compact five-quark ($5q$) states. The coupling to the $5q$ state is introduced by the contact term, where the relative strength for the meson-baryon channels is determined by the spin structure of the $5q$ states. We also introduce the one pion exchange potential (OPEP). Resonant and/or bound states are found close to the hidden-charm meson-baryon thresholds. The OPEP is not strong enough to produce a state. The states are obtained, when the $5q$ potential with the finite coupling strength is introduced. The spectrum structure is given by the spin configuration of the $5q$ states.
DOI: https://doi.org/10.22323/1.310.0250
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