Electromagnetic and Axial Current Form Factors and Spectroscopy of Three-Flavor Holographic Baryons

TL;DR

This paper uses a three-flavor holographic QCD model to compute electromagnetic and axial form factors of baryons, achieving improved agreement with experimental data over previous two-flavor models.

Contribution

It introduces a three-flavor holographic model with symmetry breaking to calculate baryon form factors and spectroscopy, enhancing the accuracy of prior two-flavor approaches.

Findings

Quantitative agreement with experimental baryon form factors

Successful modeling of negative parity baryon excitations

Improved predictions over two-flavor models

Abstract

We present an analysis of the three-flavor holographic model of QCD associated to a $D4/D8$ brane configuration, with symmetry breaking induced by a worldsheet instanton associated to a closed loop connecting $D4-D8-D6-\overline{D8}$. We calculate the electromagnetic and axial couplings of all octet and decuplet baryons, as well as several negative parity excitations, with and without symmetry breaking effects, and demonstrate qualitative and quantitative agreement with many available experimental measurements, with marked improvement over the analogous two-flavor models.