Regge theory in a holographic dual of QCD in the Veneziano limit

We initiate the study of Regge theory in a bottom-up holographic model for QCD in the Veneziano limit, where the backreaction of the quarks to the gluon dynamics is included. We determine the parameters of the model by carrying out a precise fit to the meson spectrum in QCD. The spectrum for spin-one and pseudoscalar mesons is well reproduced. We then generalise the model to incluce higher spin fields in the bulk trajectories dual to the Pomeron and meson Regge trajectories at the boundary. With this setting, we fit the masses of the mesons with spins J = 2, 3, and 4, as well as the experimental data of the total cross-sections sigma(gamma gamma -> X), sigma(gamma p -> X) and sigma( pp -> X). For the cross sections we obtain a chi(2) d.o.f. of 0.74 for a total of 199 experimental points.

Automated summary

In this study, Regge theory in a bottom-up holographic model for QCD in the Veneziano limit is explored with the backreaction of quarks to gluon dynamics included, leading to a successful fit to the meson spectrum. The model is extended to include higher spin fields dual to the Pomeron and meson Regge trajectories, enabling a fit to masses of mesons with spins J = 2, 3, and 4, as well as experimental data of total cross-sections sigma(gamma gamma -> X), sigma(gamma p -> X) and sigma(pp -> X). The obtained chi(2) d.o.f. of 0.74 for 199 experimental points indicates a good agreement for the cross sections.