The hidden charm pentaquark states and $\Sigma_c\bar{D}^{(*)}$ interaction in chiral perturbation theory

Understand

In this work, we employ the heavy hadron chiral perturbation theory (HHChPT) to calculate the $\Sigma_c\bar{D}^{(*)}$ potentials to the next-to-leading order.

• The contact, the one-pion exchange and the two-pion exchange interactions are included.
• Besides, the mass splittings between the heavy quark spin symmetry (HQSS) multiplets are kept in calculations.
• Our result shows that neglecting the heavy quark symmetry (HQS) violation effect may be misleading to predict the potentials between the charmed hadrons.