Open Access

Production of excited $Λ_{c}^{+}$ baryons through $Λ_{b}$ hadronic weak decays

Kai-Lei Wang ^1,2,*, Ya-Mei Cao¹, Hui-Xiao Duan¹, and Xian-Hui Zhong ^2,3,†

¹Department of Physics, Changzhi University, Changzhi, Shanxi 046011, China
²Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha 410081, China
³Department of Physics, Hunan Normal University, and Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Changsha 410081, China

^*Contact author: wangkaileicz@foxmail.com
^†Contact author: zhongxh@hunnu.edu.cn

Phys. Rev. D 114, 014031 – Published 16 July, 2026

DOI: https://doi.org/10.1103/cy35-5lmh

Abstract

In this work, to establish a more abundant $Λ_{c}$ baryon spectrum, we discuss the production potentials of the excited $Λ_{c}$ baryons through $Λ_{b}$ hadronic weak decays within a constituent quark model. Based on our successful explanations of the existing experimental data for the $Λ_{b} \to Λ_{c} (π^{-}, K^{-}, D^{-}, D_{s}^{-}, D_{s}^{* -})$ processes, we further calculate the decay rates of the $Λ_{b}$ baryon into the $1 P$ -, $1 D$ -, $2 S$ -, $3 S$ -, $2 P$ -, $1 F$ -, and $2 D$ -wave $Λ_{c}$ excited states. It is found that these $Λ_{c}$ excitations have large production rates in the $Λ_{b}$ hadronic weak decay process associated with $π^{-}$ meson emitting, i.e., $Λ_{b} \to Λ_{c}^{*} π^{-}$ , their branching fractions can reach up to $O (10^{- 3})$ . To search for the higher $3 S$ -, $2 P$ -, $1 F$ -, and $2 D$ -wave $Λ_{c}$ states, the $Λ_{b} \to Λ_{c} (3 S) π^{-} \to D^{* 0} p π^{-}$ , and $Λ_{b} \to Λ_{c} (2 P, 2 D, 1 F) π^{-} \to D^{(*) 0} p π^{-}$ decays are worth observing in future experiments.

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Phys. Rev. D 114, 014031– Published 16 July, 2026

Vol. 114, Iss. 1 — 1 July 2026

Received 2 January 2026
Accepted 26 May 2026

DOI: https://doi.org/10.1103/cy35-5lmh

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

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Production of excited $Λ_{c}^{+}$ baryons through $Λ_{b}$ hadronic weak decays

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Production of excited Λc+ baryons through Λb hadronic weak decays

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Production of excited $Λ_{c}^{+}$ baryons through $Λ_{b}$ hadronic weak decays