Strong decays of the low-lying doubly bottom baryons

Abstract

In this work, we adopt the ${}^3{P}_0$ model to investigate the strong decays of the low-lying doubly bottom baryons in the $j-j$ coupling scheme systematically. In this scheme, we construct the formulism of ${}^3{P}_0$ model under the spectator assumption, and then the heavy diquark symmetry is preserved automatically. Our results show that some of the $\lambda$-mode ${\Xi }_{bb}(1P)$ and ${\Omega }_{bb}(1P)$ states are narrow, which have good potentials to be observed by future experiments. For the low-lying $\rho$-mode and $\rho$-$\lambda$ hybrid states, the Okubo-Zweig-Iizuka-allowed strong decays are highly suppressed and they should be extremely narrow. Future experiments can test our phenomenological predictions at the quark level.

Comments: 12 pages, 4 figures. Some discussions are added, accepted version