Meson mass and confinement force driven by dilaton

TL;DR

This paper investigates how a dilaton-driven background influences meson spectra and confinement in a gauge theory, highlighting the importance of gauge condensate effects for realistic hadron spectrum modeling.

Contribution

It demonstrates the role of gauge condensate in meson spectra within a dilaton background, contrasting effects in supersymmetric and non-supersymmetric cases.

Findings

Gauge condensate is crucial for realistic meson spectra in non-supersymmetric theories.

In supersymmetric cases, scalar spectra are affected oppositely by the gauge condensate.

The study links dilaton backgrounds to meson mass and confinement mechanisms.

Abstract

Meson spectra given as fluctuations of a D7 brane are studied under the background driven by the dilaton. This leads to a dual gauge theory with quark confinement due to the gauge condensate. We find that the effect of the gauge condensate on the meson spectrum is essential in order to make a realistic hadron spectrum in the non-supersymmetric case. In the supersymmetric case, however, only the spectra of the scalars are affected, but they are changed in an opposite way compared to the non-supersymmetric case.