Chiral symmetry breaking driven by dilaton

TL;DR

This paper investigates how dilaton-driven deformations in a supergravity dual lead to spontaneous chiral symmetry breaking and quark confinement, providing insights into non-supersymmetric gauge theories with light quarks.

Contribution

It demonstrates that a non-supersymmetric dilaton-deformed background induces spontaneous chiral symmetry breaking and analyzes quark confinement in this holographic model.

Findings

Spontaneous chiral symmetry breaking occurs in the non-supersymmetric background.

Quark-antiquark potential indicates confinement for light quarks.

The dilaton deformation influences chiral symmetry and confinement properties.

Abstract

Dynamical properties of gauge theories with light flavor quarks are studied in a dual supergravity by adding a D7-brane probe into the AdS background deformed by the dilaton. By estimating the vev of flavor quark-bilinear in both the supersymmetric and non-supersymmetric gravity duals, we find spontaneous chiral symmetry breaking in the case of the non-supersymmetric background. We also study quark-antiquark potential for light quarks to see the quark confinement in the models considered here.