Analysis of radial excitations of octet baryons in QCD sum rules

TL;DR

This paper uses QCD sum rules to estimate the masses and residues of the first radial excitations of octet baryons, effectively isolating these states from ground state contributions.

Contribution

It introduces a method to eliminate ground state contributions by constructing linear combinations of sum rules for different Lorentz structures, providing new predictions for radial excitations.

Findings

Predicted masses align well with experimental data.

Method successfully isolates radial excitations from ground states.

Provides estimates for residues of excited octet baryons.

Abstract

Using the QCD sum rules method, we estimate the mass and residues of the first radial excitations of octet baryons. The contributions coming from the ground state baryons are eliminated by constructing the linear combinations of the sum rules corresponding to different Lorentz structures. Our predictions of the masses of the first radial excitations of octet baryons are in good agreement with the data.