Glueball Regge trajectories from gauge/string duality and the Pomeron

TL;DR

This paper uses gauge/string duality to estimate glueball masses and their Regge trajectories, finding results consistent with the Pomeron, thus advancing the understanding of non-perturbative QCD phenomena.

Contribution

It extends holographic QCD models to include glueball states and derives their Regge trajectories, especially aligning with the Pomeron trajectory.

Findings

Approximate linear Regge trajectories for glueballs

Neumann boundary conditions match Pomeron trajectory

Estimates of glueball masses with different spins

Abstract

The spectrum of light baryons and mesons has been reproduced recently by Brodsky and Teramond from a holographic dual to QCD inspired in the AdS/CFT correspondence. They associate fluctuations about the AdS geometry with four dimensional angular momenta of the dual QCD states. We use a similar approach to estimate masses of glueball states with different spins and their excitations. We consider Dirichlet and Neumann boundary conditions and find approximate linear Regge trajectories for these glueballs. In particular the Neumann case is consistent with the Pomeron trajectory.