Embedding LFHQCD in Worldsheet String Theory

TL;DR

This paper explores embedding light-front holographic QCD within worldsheet string theory, proposing an N=2 superconformal extension that offers new phenomenological insights and solutions to string theory challenges.

Contribution

It introduces an N=2 superconformal quantum group extension of LFHQCD, enabling novel string theory model-building aligned with phenomenology.

Findings

Provides a string theory framework consistent with hadronic spectra.

Offers solutions to supersymmetry without superpartners.

Breaks conformal symmetry introducing a low-energy scale.

Abstract

Light-front holographic quantum chromodynamics (LFHQCD) has been proposed as an approximation to QCD which is non-perturbative and at the same time analytically tractable. It can be derived from the holographic light-cone Hamiltonian and effectively corresponds to a one-dimensional superconformal quantum theory. It is proposed in this paper to extend the underlying quantum group to N = 2 SCFT. This provides an avenue for bottom-up string theory model-building which is firmly grounded in phenomenology. Moreover, the peculiar properties of the model carry over to provide novel solutions to string theory problems, including supersymmetry without predicting superpartners as well as the breaking of the conformal symmetry and the introduction of a low-energy scale such that the massive Virasoro modes correspond to hadronic states reminiscent of what was once envisioned in the Veneziano model.