Glueball spectrum and the Pomeron in the Wilson loop approach

TL;DR

This paper employs a nonperturbative Wilson loop approach to compute glueball masses and Regge trajectories, aligning well with lattice results and providing insights into the Pomeron trajectory and its mixing with other meson trajectories.

Contribution

It introduces a Wilson loop-based nonperturbative method to calculate glueball spectra and Regge trajectories, incorporating Pomeron dynamics and mixing effects.

Findings

Glueball masses agree with lattice QCD results.

The leading glueball trajectory related to the Pomeron is characterized.

Mixing of Pomeron with f and f' trajectories is analyzed.

Abstract

Using a nonperturbative method based on asymptotic behaviour of Wilson loops we calculate masses of glueballs and corresponding Regge-trajectories. The only input is string tension fixed by meson Regge slope, while perturbative contributions to spin splittings are defined by standard alpha_s values. The masses of lowest glueball states are in a perfect agreement with lattice results. The leading glueball trajectory which is associated with Pomeron is discussed in details and its mixing with f and f' trajectories is taken into account.