Quark model description of the \Lambda_c(2940)^+ as a molecular D^*N state and the possible existence of the \Lambda_b(6248)

TL;DR

This paper models the \\Lambda_c(2940)^+ as a molecular D^*N state using a constituent quark model, successfully reproducing its properties and predicting a bottom partner state around 6248 MeV/c^2.

Contribution

It introduces a molecular quark model approach to describe the \\Lambda_c(2940)^+ and predicts a new bottom baryon partner, expanding understanding of heavy baryon states.

Findings

Identifies a bound state with correct binding energy for J^\\pi=3/2^-

Calculates decay widths consistent with experimental data

Predicts a bottom partner \\Lambda_b(6248) with specific mass

Abstract

The \Lambda_c(2940)^+ baryon is studied in a constituent quark model as a molecular state composed by nucleons and D^* mesons. A bound state with the right binding energy is found for the J^\pi=3/2^- channel. The partial widths \Lambda_c(2940)^+\to ND and \Lambda_c(2940)^+\to \Sigma_c \pi are calculated and the results are consistent with the experimental data. Additionally a bottom partner \bar B^*N is predicted with a mass of 6248 MeV/c^2.