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arXiv · 1812.05956

$\Omega_c$ excited states: a molecular approach with heavy-quark spin symmetry

Laura Tolos·Rafael Pavao·Juan Nieves
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Abstract

The LHCb Collaboration has recently discovered five excited $\Omega_c$ states with masses between 3 and 3.1 GeV, four of them corroborated by the Belle Collaboration. We analyse the dynamical generation of these states within a molecular baryon-meson model that is consistent with both chiral and heavy-quark spin symmetries. Earlier predictions within this model found five $\Omega_c$ states with masses below 3 GeV. Thus, in order to study the possible identification of any of these states with the experimental ones in the correct energy region, we explore two different regularization schemes, that is, a modified regularization subtraction method and a cutoff regularization scheme. We find that at least three of the dynamically generated states can be identified with the experimental ones and have spin-parity $J=1/2^-$ or $J=3/2^-$

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Laura Tolos, Rafael Pavao, Juan Nieves. 2018-12-14. $\Omega_c$ excited states: a molecular approach with heavy-quark spin symmetry. https://doi.org/10.7566/jpscp.26.022024

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