English

The $1D$, $2D$ $\Xi_{b}$ and $\Lambda_{b}$ baryons

High Energy Physics - Phenomenology 2023-04-14 v3

Abstract

Recently, scientists have made great progresses in experiments in searching for the excited states of Ξb\Xi_{b} and Λb\Lambda_{b} baryons such as the Λb(6072)\Lambda_{b}(6072), Λb(6146)\Lambda_{b}(6146), Λb(6152)\Lambda_{b}(6152), Ξb(6227)\Xi_{b}(6227), Ξb(6100)\Xi_{b}(6100), Ξb(6327)\Xi_{b}(6327) and Ξb(6333)\Xi_{b}(6333). Stimulated by these progresses, we give a systematical analysis about the 1D1D and 2D2D states of Ξb\Xi_{b} and Λb\Lambda_{b} baryons with the method of QCD sum rules. By constructing three types of interpolating currents, we calculate the masses and pole residues of these heavy baryons with different excitation modes (Lρ,Lλ)=(0,2)(L_{\rho},L_{\lambda})=(0,2), (2,0)(2,0) and (1,1)(1,1). As a result, we decode the inner structures of Λb(6146)\Lambda_{b}(6146), Λb(6152)\Lambda_{b}(6152), Ξb(6327)\Xi_{b}(6327) and Ξb(6333)\Xi_{b}(6333), and favor assigning these states as the 1D1D baryons with the quantum numbers (Lρ,Lλ)=(0,2)(L_{\rho},L_{\lambda})=(0,2) and 32+\frac{3}{2}^{+}, 52+\frac{5}{2}^{+}, 32+\frac{3}{2}^{+} and 52+\frac{5}{2}^{+}, respectively. In addition, the predictions about the masses and pole residues of the other 1D1D and 2D2D states of Ξb\Xi_{b} and Λb\Lambda_{b} baryons in this paper are helpful in studying the D-wave bottom baryons in experiments in the future.

Keywords

Cite

@article{arxiv.2109.02217,
  title  = {The $1D$, $2D$ $\Xi_{b}$ and $\Lambda_{b}$ baryons},
  author = {Guo-Liang Yu and Zhi-Gang Wang and Xiu-Wu Wang},
  journal= {arXiv preprint arXiv:2109.02217},
  year   = {2023}
}
R2 v1 2026-06-24T05:42:08.521Z