# Strong decays of the latest LHCb pentaquark candidates in hadronic molecule pictures

## TL;DR

This paper analyzes the decay properties of recently observed LHCb pentaquark candidates using hadronic molecule models, providing insights into their possible spin-parity assignments and internal structures.

## Contribution

It offers a systematic calculation of decay widths for pentaquark candidates within the hadronic molecule framework, incorporating heavy quark spin symmetry and effective Lagrangian methods.

## Key findings

- $P_c(4312)$ fits a $ar{D}\Sigma_c$ molecule with $1/2^-$.
- $P_c(4440)$ fits a $ar{D}^*\Sigma_c$ molecule with $1/2^-$.
- $P_c(4457)$ fits a $ar{D}^*\Sigma_c$ molecule with $3/2^-$.

## Abstract

We investigate the observed pentaquark candidates $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$ from the latest LHCb measurement, as well as four possible spin partners in the $\bar{D}^{(*)}\Sigma_c^*$ system predicted from the heavy quark spin symmetry with the hadronic molecule scenarios. Similar to the previous calculation on $P_c(4380)$ and $P_c(4450)$, the partial widths of all the allowed decay channels for these $P_c$ states are estimated with the effective Lagrangian method. The cutoff dependence of our numerical results are also presented. Comparing with the experimental widths, our results show that $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$ can be described well with the spin-parity-$1/2^-$-$\bar{D}\Sigma_c$, $1/2^-$-$\bar{D}^*\Sigma_c$ and $3/2^-$-$\bar{D}^*\Sigma_c$ molecule pictures, respectively.