On the Convergence of the Expansion of Renormalization Group Flow Equation

Details On the Convergence of the Expansion of Renormalization Group Flow Equation On the Convergence of the Expansion of Renormalization Group Flow Equation

1999-09-03

arxiv.org/abs/hep-ph/9909246v3

Phys.Rev. D61 (2000) 096002

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages with 10 EPS figures included; revised version

Scientific paper

10.1103/PhysRevD.61.096002

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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