Convergence of the expansion of the renormalization group flow equation - art. no. 096002

Authors
Papp, G Schaefer, BJ Pirner, HJ Wambach, J
Citation
G. Papp et al., Convergence of the expansion of the renormalization group flow equation - art. no. 096002, PHYS REV D, 6109(9), 2000, pp. 6002
Citations number
37
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
05562821 → ACNP
Volume
6109
Issue
9
Year of publication
2000
Database
ISI
SICI code
0556-2821(20000501)6109:9<6002:COTEOT>2.0.ZU;2-F
Abstract
We compare and discuss the dependence of a polynomial truncation of the eff ective potential used to solve an exact renormalization group flow equation for a model with a fermionic interaction (linear sigma model) with a grid solution. The sensitivity of the results to the underlying cutoff Function is discussed. We explore the validity of the expansion method for second- a nd first-order phase transitions.