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arXiv · hep-ph/9909246

On the Convergence of the Expansion of Renormalization Group Flow Equation

G. Papp·B. -J. Schaefer·H. -J. Pirner·J. Wambach
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Abstract

We compare and discuss the dependence of a polynomial truncation of the effective potential used to solve exact renormalization group flow equation for a model with fermionic interaction (linear sigma model) with a grid solution. The sensitivity of the results on the underlying cutoff function is discussed. We explore the validity of the expansion method for second and first-order phase transitions.

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G. Papp, B. -J. Schaefer, H. -J. Pirner, J. Wambach. 1999-11-12. On the Convergence of the Expansion of Renormalization Group Flow Equation. https://doi.org/10.1103/physrevd.61.096002

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