On the Universality Class of Certain String Theory Hadrons

TL;DR

This paper investigates the spectrum of hadronic-like bound states in confining theories using gauge/gravity duality, revealing universal features and discovering a new non-supersymmetric geometric solution.

Contribution

It demonstrates the universality of hadronic states across various confining theories with supergravity duals and introduces a novel non-supersymmetric deformation of G_2 manifolds.

Findings

Universal spectrum of hadronic states in confining theories

Numerical discovery of a new smooth non-supersymmetric solution

Evidence for common features in supergravity duals of confining gauge theories

Abstract

Exploiting the gauge/gravity correspondence we find the spectrum of hadronic-like bound states of adjoint particles with a large global charge in several confining theories. In particular, we consider an embedding of four-dimensional N=1 supersymmetric Yang-Mills into IIA string theory, two classes of three-dimensional gauge theories and the softly broken version of one of them. In all cases we describe the low energy excitations of a heavy hadron with mass proportional to its global charge. These excitations include: the hadron's nonrelativistic motion, its stringy excitations and excitations corresponding to the addition of massive constituents. Our analysis provides ample evidence for the universality of such hadronic states in confining theories admitting supergravity duals. Besides, we find numerically a new smooth solution that can be thought of as a non-supersymmetric deformation of G_2 holonomy manifolds.