Doubly charmed multibaryon systems

TL;DR

This paper investigates two- and three-baryon systems with charm quarks, predicting bound states and resonances using a constituent quark model, revealing a narrow $ ext{Σ}_c ext{Σ}_c$ resonance and its contribution to a three-baryon resonance.

Contribution

It provides the first consistent derivation of interactions from a constituent quark model for charm baryon systems, predicting novel resonances.

Findings

Identifies a narrow $ ext{Σ}_c ext{Σ}_c$ resonance 6.2 MeV below threshold.

Predicts a $N ext{Σ}_c ext{Σ}_c$ resonance with 0.2 MeV separation energy.

Shows heavy quark presence simplifies two-body interactions.

Abstract

We study two- and three-baryon systems with two units of charm looking for possible bound states or resonances. All two-baryon interactions are consistently derived from a constituent quark model tuned in the light-flavor hadron phenomenology: spectra and interactions. The presence of the heavy quarks makes the two-body interactions simpler than in the light-flavor sector. Our results show a narrow two-body resonance with quantum numbers $(I,J^P)=(0,0^+)$. It is located 6.2 MeV below the $\Sigma_c\Sigma_c$ threshold and has a width of 4.7 MeV. The foregoing two-body state contributes to generate a $N \Sigma_c\Sigma_c$ resonance with quantum numbers $(I,J^P)=(1/2,1/2^+)$ and a separation energy of 0.2 MeV.