Possible $\Lambda_c\Lambda_c$ molecular bound state

TL;DR

This paper investigates the potential for a bound state of two $ ext{Lambda}_c$ baryons forming a hadronic molecule using a one-pion-exchange model, highlighting the importance of tensor forces and channel couplings.

Contribution

It introduces a phenomenological approach to model heavier meson exchanges and emphasizes the role of channel couplings in the formation of $ ext{Lambda}_c ext{Lambda}_c$ molecules.

Findings

A possible $ ext{Lambda}_c ext{Lambda}_c$ bound state exists under certain conditions.

Tensor forces are crucial for the binding mechanism.

Binding energies are sensitive to the cutoff parameter.

Abstract

Possible $\Lambda_c\Lambda_c$ hadronic molecule is investigated in the one-pion-exchange potential model. In the study with this model, the heavier meson exchange effects are encoded into a phenomenological cutoff parameter and couplings to the nearby $\Sigma_c\Sigma_c$, $\Sigma_c\Sigma_c^*$, and $\Sigma_c^*\Sigma_c^*$ channels are essential. From the numerical results, we find that a molecular bound state of two $\Lambda_c$'s is possible, where the tensor force plays a crucial role, although the binding energies are sensitive to the cutoff parameter.