$b$-hadron spectroscopy study based on the similarity of double bottom baryon and bottom meson

TL;DR

This study explores the spectral similarities between double bottom baryons and bottom mesons, analyzing their masses and decays to interpret recent experimental states and predict properties of unobserved states.

Contribution

It introduces a unified theoretical approach to compare $bbq$ baryons and $ar{b}q$ mesons, providing insights into their spectral similarities and interpreting recent experimental discoveries.

Findings

$B_J(5840)$ likely a 2S state

$B_J(5970)$ possibly a 1D doublet member

$B_{sJ}(6064)$ and $B_{sJ}(6114)$ are probably D-wave states

Abstract

The dynamical similarity which exists between the $\lambda$-mode excited $bbq$ baryons ($q$ refers to the $u$, $d$, and $s$ quarks) and the $\bar{b}q$ mesons inspires us to carry out a combined study of their spectroscopy. In this work, the masses and strong decays of these low-lying $b\bar{q}$ and $bbq$ states are studied by the same theoretical methods, and the dynamical similarity which is implied in their mass spectra and strong decays are also discussed. The recent discovered $\bar{b}q$ states, including the $B_J(5840)$, $B_J(5970)$, $B_{sJ}(6064)$, and $B_{sJ}(6114)$, are analyzed. According to our result, the $B_J(5840)$ could be assigned as a 2$S$ state, while the $B_J(5970)$ could be regarded as a member of the $1D(2^-,~3^-)_{j_q=5/2}$ doublet. The $B_{sJ}(6064)$ and $B_{sJ}(6114)$ are probably the $D$-wave states. Especially, they could be explained as the members of the $1D(1^-,~2^-)_{j_q=3/2}$ and $1D(2^-,~3^-)_{j_q=5/2}$ doublets, respectively. The predicted masses and decay properties of other unknown $\bar{b}q/bbq$ states may provide useful clues to the future experiment.