MCRG study of 12 fundamental flavors with mixed fundamental-adjoint gauge action

TL;DR

This paper investigates the infrared behavior of an SU(3) gauge model with 12 fundamental fermions, demonstrating the existence of an infrared fixed point and conformal dynamics using an improved Monte Carlo renormalization group method.

Contribution

The study introduces a new analysis method for 2-lattice matching MCRG that reduces finite volume effects and employs a lattice action avoiding spurious ultraviolet fixed points.

Findings

Identifies an infrared fixed point in the 12-flavor SU(3) model.

Shows evidence of conformal infrared dynamics.

Develops an improved MCRG analysis technique.

Abstract

I discuss the infrared behavior of the SU(3) gauge model with 12 fundamental fermions. Using a Monte Carlo renormalization group technique I investigate the fixed point structure in the chiral limit and show that this system has an infrared fixed point and consequently conformal infrared dynamics. I am able to reach the FP by using a new analysis method for the 2-lattice matching MCRG technique that significantly reduces finite volume effects and by choosing a lattice action that avoids a spurious ultraviolet fixed point created by strong coupling lattice artifacts.