Strong decays of the low-lying doubly bottom baryons

TL;DR

This paper uses the $^3P_0$ model to systematically study the strong decay properties of low-lying doubly bottom baryons, predicting narrow states that are promising for future experimental observation.

Contribution

It introduces a $^3P_0$ model framework under the $j-j$ coupling scheme that preserves heavy diquark symmetry for analyzing doubly bottom baryon decays, providing new theoretical predictions.

Findings

Some $ ext{λ}$-mode $ ext{Ξ}_{bb}(1P)$ and $ ext{Ω}_{bb}(1P)$ states are narrow and observable.

$ ho$-mode and $ ho$-$ ext{λ}$ hybrid states are highly suppressed and extremely narrow.

Predictions can be tested by future experiments at the quark level.

Abstract

In this work, we adopt the $^3P_0$ 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 $^3P_0$ 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.