Spin Two Glueball Mass and Glueball Regge Trajectory from Supergravity

TL;DR

This paper computes the spin two glueball mass and Regge trajectory in N=1 super Yang-Mills using supergravity, showing linearity and agreement with lattice data.

Contribution

It provides the first calculation of the spin two glueball mass and Regge trajectory from the Klebanov-Strassler background, revealing linearity and matching lattice results.

Findings

Regge trajectory is linear with slope 0.23

Mass ratios agree with lattice data within one standard deviation

0++, 1--, and 2++ states lie on the same trajectory

Abstract

We calculate the mass of the lowest lying spin two glueball in N=1 super Yang-Mills from the dual Klebanov-Strassler background. We show that the Regge trajectory obtained is linear; the 0++, 1-- and 2++ states lie on a line of slope 0.23 -measured in units of the conifold deformation. We also compare mass ratios with lattice data and find agreement within one standard deviation.