The standard Hartree-Fock approximation of the O(N)-invariant Ï•4 model suffers from serious renormalization problems. In addition, when the symmetry is spontaneously broken, another shortcoming appears in relation to the Goldstone bosons: they fail to be massless in the intermediate states. In this work, within the framework of out-of-equilibrium Quantum Field Theory, we propose a class of systematic improvements of the Hartree-Fock resummation which overcomes all the above mentioned difficulties while ensuring also exact Renormalization-Group invariance to one loop. © 2006 The American Physical Society.
DESTRI, C., & SARTIRANA A. (2006). Improved Hartree--Fock resummations and spontaneous symmetry breaking. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, PHYSICAL REVIEW D 73, 025012 (2006).
Citazione: | DESTRI, C., & SARTIRANA A. (2006). Improved Hartree--Fock resummations and spontaneous symmetry breaking. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, PHYSICAL REVIEW D 73, 025012 (2006). |
Tipo: | Articolo in rivista - Articolo scientifico |
Carattere della pubblicazione: | Scientifica |
Titolo: | Improved Hartree--Fock resummations and spontaneous symmetry breaking |
Autori: | DESTRI, C.; SARTIRANA A. |
Autori: | |
Data di pubblicazione: | 18-gen-2006 |
Lingua: | English |
Rivista: | PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevD.73.025012 |
Appare nelle tipologie: | 01 - Articolo su rivista |
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