Strong decays of the 1P and 2D doubly charmed states

TL;DR

This paper systematically investigates the strong decay properties of low-lying 1P and 2D doubly charmed baryons using the $^3P_0$ model, predicting decay widths and dominant decay modes for various states.

Contribution

It provides the first comprehensive predictions of decay widths and modes for 1P and 2D doubly charmed baryons, guiding future experimental searches.

Findings

1P ρ mode excitations are narrow states with specific J^P values.

Certain 1P λ mode states have widths around 150 MeV and decay into ground states.

2D states decay mainly via meson emission, with widths sensitive to masses.

Abstract

We perform a systematical investigation of the strong decay properties of the low-lying $1P$- and $2D$-wave doubly charmed baryons with the $^3P_0$ quark pair creation model. The main predictions include: (i) in the $\Xi_{cc}$ and $\Omega_{cc}$ family, the $1P~\rho$ mode excitations with $J^P=1/2^-$ and $3/2^-$ should be the fairly narrow states. (ii) For the $1P~\lambda$ mode excitations, $|^2P_{\lambda}\frac{3}{2}^-\rangle$ and $|^4P_{\lambda}\frac{3}{2}^-\rangle$ have a width of $\Gamma\sim150$ MeV, and mainly decay into the $J^P=3/2^+$ ground state. Meanwhile, $|^2P_{\lambda}\frac{1}{2}^-\rangle$ and $|^4P_{\lambda}\frac{5}{2}^-\rangle$ are the narrow states with a width of $\Gamma\sim40$ MeV, and mainly decay into the ground state with $J^P=1/2^+$. (iii) The $2D_{\rho\rho}$ states mainly decay via emitting a heavy-light meson if their masses are above the threshold of $\Lambda_cD$ or $\Xi_cD$, respectively. Their strong decay widths are sensitive to the masses and can reach several tens MeV. (iv) The $2D_{\lambda\lambda}$ states may be broad states with a width of $\Gamma>100$ MeV. It should be emphasized that the states with $J^P=3/2^+$ and $5/2^+$ mainly decay into the ground state with $J^P=3/2^+$ plus a light-flavor meson, while the states with $J^P=1/2^+$ and $7/2^+$ mainly decay into the ground state with $J^P=1/2^+$ plus a light-flavor meson.