Linear meson and baryon trajectories in AdS/QCD

TL;DR

This paper constructs an approximate holographic dual of QCD using AdS/QCD that successfully reproduces the linear trajectories of excited hadron masses, providing new relations and good agreement with experimental data.

Contribution

It introduces a novel AdS/QCD model with metric deformations that captures linear hadron trajectories and predicts new mass relations.

Findings

Reproduces empirical linear hadron trajectories with universal slope.

Derives new relations between ground state masses and trajectory slopes.

Achieves good overall agreement with experimental hadron spectra.

Abstract

An approximate holographic dual of QCD is constructed and shown to reproduce the empirical linear trajectories of universal slope on which the square masses of radially and orbitally excited hadrons join. Conformal symmetry breaking and other IR effects are described exclusively by deformations of the anti-de Sitter background metric. The predictions for the light hadron spectrum include new relations between ground state masses and trajectory slopes and are in good overall agreement with experimental data.