Broken Conformal Window

TL;DR

This paper investigates how chiral symmetry breaking occurs near the conformal window edges of supersymmetric QCD with AMSB, using perturbative expansions and duality, predicting symmetry breaking for certain flavor ranges.

Contribution

It introduces a novel analysis of chiral symmetry breaking near the conformal window edges in supersymmetric QCD with AMSB, using perturbation theory and Seiberg duality.

Findings

Chiral symmetry can be broken depending on RG flow initial conditions.

Predicts symmetry breaking for N_f ≤ 3N_c - 1.

Uncertain about behavior for N_f ≥ 3N_c.

Abstract

We show that near the edges of the conformal window of supersymmetric $SU(N_c)$ QCD, perturbed by Anomaly Mediated Supersymmetry Breaking (AMSB), chiral symmetry can be broken depending on the initial conditions of the RG flow. We do so by perturbatively expanding around Banks--Zaks fixed points and taking advantage of Seiberg duality. Interpolating between the edges of the conformal window, we predict that non-supersymmetric QCD breaks chiral symmetry up to $N_f \leq 3N_c - 1$, while we cannot say anything definitive for $N_f \geq 3N_c$ at this moment.