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Type: Artigo de periódico
Title: Implicit And Explicit Renormalization: Two Complementary Views Of Effective Interactions
Author: Ruiz Arriola E.
Szpigel S.
Timoteo V.S.
Abstract: We analyze quantitatively the interplay between explicit and implicit renormalization in Nuclear Physics. By explicit renormalization we mean to integrate out higher energy modes below a given cutoff scale using the similarity renormalization group (SRG) with a block-diagonal evolution generator, which separates the total Hilbert-space into a model space and its complementary. In the implicit renormalization we impose given conditions at low energies for a cutoff theory. In both cases we compare the outcoming effective interactions as functions of the cutoff scale. We carry out a comprehensive analysis of a toy-model which captures the main features of the nucleon-nucleon (. NN) S-wave interaction at low energies. We find a wide energy region where both approaches overlap. This amounts to a great simplification in the determination of the effective interaction. Actually, the outcoming scales are within the expected ones relevant for the physics of light nuclei.
Editor: Academic Press Inc.
Rights: fechado
Identifier DOI: 10.1016/j.aop.2014.11.010
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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