Heavy flavor dibaryons

TL;DR

This study investigates the possibility of a loosely bound heavy-flavor dibaryon with charm quarks using a chiral quark model, concluding such a state likely does not exist as a bound state but may appear as a resonance.

Contribution

The paper applies a chiral constituent quark model to analyze heavy-flavor dibaryons with charm, providing new insights into their potential existence and properties.

Findings

No bound charmed H-like dibaryon found.

Possible resonance state above the $\Lambda_c\Lambda_c$ threshold.

Heavy quark interactions are simpler than in light baryon systems.

Abstract

We study the two-baryon system with two units of charm looking for the possible existence of a loosely bound state resembling the $H$ dibaryon. We make use of a chiral constituent quark model tuned in the description of the baryon and meson spectra as well as the $NN$ interaction. The presence of the heavy quarks makes the interaction simpler than in light baryon systems. We analyze possible quark-Pauli effects that would be present in spin-isospin saturated channels. Our results point to the non-existence of a charmed $H$-like dibaryon, although it may appear as a resonance above the $\Lambda_c\Lambda_c$ threshold.