Infrared fixed point of the 12-fermion SU(3) gauge model based on 2-lattice MCRG matching

Abstract

I investigate an SU(3) gauge model with 12 fundamental fermions. The physically interesting region of this strongly coupled system can be influenced by an ultraviolet fixed point due to lattice artifacts. I suggest to use a gauge action with an additional negative adjoint plaquette term that lessens this problem. I also introduce a new analysis method for the 2-lattice matching Monte Carlo renormalization group technique that significantly reduces finite volume effects. The combination of these two improvements allows me to measure the bare step scaling function in a region of the gauge coupling where it is clearly negative, indicating a positive renormalization group $\beta$ function and infrared conformality.

4 pages, 3 figures

References in corpus (5)

• Lattice Simulations and Infrared Conformality
• Infrared fixed point in SU(2) gauge theory with adjoint fermions
• Finite-size scaling tests for spectra in SU(3) lattice gauge theory coupled to 12 fundamental flavor fermions
• Renormalization Group Therapy
• Improving the improved action

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