Anomalous and linear holographic hard wall models for light unflavored mesons

TL;DR

This paper develops holographic hard wall models for light unflavored mesons, incorporating anomalous dimensions and linear trajectories, achieving accurate mass predictions and Regge trajectories consistent with experimental data.

Contribution

It introduces anomalous and linear holographic hard wall models that improve meson mass predictions and Regge trajectory descriptions based on gauge/string duality.

Findings

Mass deviations less than 3% from PDG data

Good reproduction of Regge trajectories

Anomalous dimensions depend on meson spin logarithm

Abstract

In this work we consider anomalous and linear holographic hard wall (HW) models for light unflavored mesons inspired by the AdS/CFT correspondence. The anomalous dimensions depend on the logarithm of the spin S of the meson state and come from a semiclassical analysis of gauge/string duality. The anomalous HW model produces very good masses and good Regge trajectories for mesons compared with PDG data. Inspired by this anomalous HW model we also propose a phenomenological modification of the dimension of the boundary operators such that the model produces asymptotic linear Regge trajectories. Both anomalous HW models considered here present mass percentage deviations of less than 3%, when compared with PDG data.