Improving the Excited Nucleon Spectrum in Hard-Wall AdS/QCD

TL;DR

This paper enhances the hard-wall AdS/QCD model's accuracy in predicting the excited nucleon spectrum by adjusting the IR cutoff, achieving a close fit to experimental data with minimal error.

Contribution

It introduces a larger IR cutoff in the hard-wall AdS/QCD model to improve the fit of nucleon masses to experimental data.

Findings

Nucleon masses fit within 11% of experimental values.

Average error in mass predictions is only 4.66%.

Model adjustments significantly improve spectrum predictions.

Abstract

We show that the nucleon spectrum in a hard-wall AdS/QCD model can be improved by use of a relatively large IR cutoff. All of the spin-1/2 nucleon masses listed in PDG can be fit quite well within 11%. The average error is remarkably only 4.66%.