Probing Flavored Mesons of Confining Gauge Theories by Supergravity

TL;DR

This paper uses supergravity duals to study flavored mesons in confining gauge theories, revealing discrete spectra with a mass gap related to glueball masses.

Contribution

It introduces D7 brane probes into the Klebanov Strassler background to analyze flavored mesons, providing new insights into their spectra in confining theories.

Findings

Discrete meson spectra with a mass gap

Mass gap comparable to glueball mass

Probe configurations solving D7 equations of motion

Abstract

We incorporate massive flavored fundamental quarks in the supergravity dual of N=1 SYM by introducing D7 brane probes to the Klebanov Strassler background. We find probe configurations that solve the D7 equations of motion. We compute the quadratic fluctuations of the D7 brane and extract the spectrum of vector and pseudo scalar flavored mesons. The spectra found are discrete and exhibit a mass gap of the order of the glueball mass.