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Journal of Physics G 36 (2008) 015006
Effective potential and vacuum stability
V. Branchina1, H. Faivre2, V. Pangon2
(2008)

By following previous work on this subject, we investigate the issue of the instability of the electroweak vacuum against the top loop corrections by performing an accurate analysis of a Higgs-Yukawa model. We find that, when the physical cutoff is properly implemented in the theory, the potential does not exhibit any instability. Moreover, contrary to recent claims, we show that this instability cannot be understood in terms of the very insightful work of Wu and Weinberg on the non-convexity of the one-loop effective potential of a scalar theory. Some of the theoretical and phenomenological consequences of our results are briefly discussed.
1 :  INFN, Sezione di Catania - Istituto Nazionale di Fisica Nucleare, Sezione di Catania
2 :  DRS-IPHC - Département Recherches Subatomiques
Physique/Physique des Hautes Energies - Phénoménologie
Lien vers le texte intégral : 
http://fr.arXiv.org/abs/0802.4423