Analysis of the ${1\over 2}^{\pm}$ flavor antitriplet heavy baryon states with QCD sum rules

TL;DR

This paper uses QCD sum rules to analyze the masses and residues of ${1/2}^\pm$ flavor antitriplet heavy baryons, providing predictions consistent with experiments and estimating unobserved states.

Contribution

It introduces a method to subtract contributions from opposite parity states in QCD sum rules to accurately study heavy baryon properties.

Findings

Masses agree with experimental data

Predictions for unobserved ${1/2}^-$ bottom baryons

Pole residues as parameters for hadronic processes

Abstract

In this article, we study the masses and pole residues of the ${1\over 2}^\pm$ flavor antitriplet heavy baryon states ($\Lambda_c^+$, $\Xi_c^+,\Xi_c^0)$ and ($\Lambda_b^0$, $\Xi_b^0,\Xi_b^-)$ by subtracting the contributions from the corresponding ${1\over 2}^\mp$ heavy baryon states with the QCD sum rules, and observe the masses are in good agreement with the experimental data and make reasonable predictions for the unobserved ${1\over 2}^-$ bottom baryon states. Once reasonable values of the pole residues $\lambda_{\Lambda}$ and $\lambda_{\Xi}$ are obtained, we can take them as basic parameters to study the revelent hadronic processes with the QCD sum rules.