# Canonical interpretation of the newly observed $\Lambda_b(6146)^0$ and $\Lambda_b(6152)^0$ via strong decay behaviors

## TL;DR

This paper analyzes the strong decay behaviors of newly observed bottom baryons, assigning their quantum states and estimating decay widths to clarify their identities, and predicts other potential states for future experiments.

## Contribution

It provides a canonical interpretation of the $ ext{Lambda}_b$ states using decay models, clarifying their quantum numbers and proposing assignments based on decay behaviors.

## Key findings

- $ ext{Lambda}_b(6146)^0$ is assigned as a $J^P=5/2^+$ $ ext{Lambda}_b(1D)$ state.
- $ ext{Lambda}_b(6152)^0$ is assigned as a $J^P=3/2^+$ $ ext{Lambda}_b(1D)$ state.
- Other low-lying bottom states are predicted to be narrow and observable in future experiments.

## Abstract

Stimulated by the newly observed $\Lambda_b(6146)^0$ and $\Lambda_b(6152)^0$ resonances, we investigate the strong decays of the low-lying singly bottom baryons within the quark pair creation model. Considering their masses and decay modes, we tentatively assign these states as the $\lambda-$ mode $\Lambda_b(2S)$, $\Lambda_b(1D)$, $\Sigma_b(2S)$, and $\Sigma_b(1P)$ states, and then estimate their strong decay widths. Compared with the experimental total widths and decay modes measured by the LHCb Collaboration, the $\Lambda_b(6146)^0$ and $\Lambda_b(6152)^0$ can be reasonably clarified into the $J^P=5/2^+$ and $J^P=3/2^+$ $\Lambda_b(1D)$ sates respectively, while other canonical assignments are disfavored. Other low-lying bottom states are also presented, where various narrow states may have good potential to be observed in future LHCb experiments.