https://doi.org/10.1140/epja/i2018-12385-9
Regular Article - Theoretical Physics
Effect of the quartic gradient terms on the critical exponents of the Wilson-Fisher fixed point in O(N) models
Department of Theoretical Physics, University of Debrecen, P.O. Box 5, H-4010, Debrecen, Hungary
* e-mail: zoltanpeli92@gmail.com
Received:
20
June
2017
Accepted:
14
September
2017
Published online:
19
February
2018
The effect of the 
terms of the gradient expansion on the anomalous dimension 
and the correlation length’s critical exponent 
of the Wilson-Fisher fixed point has been determined for the Euclidean 3-dimensional O(N) models with 
. Wetterich’s effective average action renormalization group method is used with field-independent derivative couplings and Litim’s optimized regulator. It is shown that the critical theory is well approximated by the effective average action preserving O(N) symmetry with an accuracy of 
.
© SIF, Springer-Verlag GmbH Germany, part of Springer Nature, 2018
