Speaker
Prof.
Sergio Szpigel
(UPM)
Description
Effective interactions can be obtained from a renormalization group analysis in two complementary ways. One can either explicitly integrate out higher energy modes or impose given conditions at low energies for a cutoff theory. While the first method is numerically involved, the second one can be solved almost analytically. In both cases we compare the outcoming effective interactions as functions of the cutoff scale Λ. We carry out a comprehensive analysis of a toy-model which captures the main features of the nucleon-nucleon S-wave interaction at low energies and find a strikingly wide energy region where both approaches overlap
Author
Prof.
Sergio Szpigel
(UPM)
Co-authors
Prof.
Enrique Ruiz Arriola
(University of Granada)
Prof.
Varese Salvador Timóteo
(UNICAMP)
