Low-energy holographic models for QCD

TL;DR

This paper explores low-energy holographic QCD models with a UV cutoff, showing how such modifications can incorporate constituent quark mass and alter predictions, with potential for simplified flat space models.

Contribution

It introduces a UV cutoff into bottom-up holographic QCD models, enabling the inclusion of constituent quark mass and alternative flat space formulations.

Findings

UV cutoff changes model predictions

Incorporating constituent quark mass is possible

Flat space models with modified dilaton can reproduce results

Abstract

We consider the bottom-up holographic models for QCD which contain the ultraviolet (UV) cutoff. Such models are supposed to describe exclusively the low-energy sector of QCD. The introduction of UV cutoff in the soft wall model is shown to result in a model with qualitatively different predictions. The ensuing model seems to be able to incorporate the constituent quark mass. It is also demonstrated that in order to reproduce the results of the usual soft wall model for the vector and higher spin mesons in the presence of the UV cutoff one can consider the flat bulk space with a modified dilaton background.