Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Bergerhoff, Bastian"'
Publikováno v:
Phys.Lett. B488 (2000) 435-442
We propose a nonperturbative scheme for the calculation of thermal damping-rates using exact renormalization group (RG)-equations. Special emphasis is put on the thermal RG where first results for the rate were given in M. Pietroni, Phys. Rev. Lett.
Externí odkaz:
http://arxiv.org/abs/hep-ph/0004039
Publikováno v:
Phys.Rev. D61 (2000) 125005
We formulate the thermal renormalization group, an implementation of the Wilsonian RG in the real-time (CTP) formulation of finite temperature field theory, for fermionic fields. Using a model with scalar and fermionic degrees of freedom which should
Externí odkaz:
http://arxiv.org/abs/hep-ph/9912474
Publikováno v:
Phys.Lett.B469:61-68,1999
We study the question whether a possible metastable vacuum state is actually populated in a phase transition in the early universe, as is usually assumed in the discussion of vacuum stability bounds e.g. for Standard Model parameters. A phenomenologi
Externí odkaz:
http://arxiv.org/abs/hep-ph/9909261
Publikováno v:
Phys.Rev.D60:105036,1999
We discuss the formulation of "thermal renormalization group-equations" and their application to the finite temperature phase-transition of scalar O(N)-theories. Thermal renormalization group-equations allow for a computation of both the universal an
Externí odkaz:
http://arxiv.org/abs/hep-ph/9809251
Autor:
Bergerhoff, Bastian
Publikováno v:
Phys.Lett. B437 (1998) 381-389
We discuss the universal critical behavior of a selfinteracting scalar field theory at finite temperature as obtained from approximate solutions to nonperturbative renormalization group (RG) equations. We employ a formulation of the RG-equations in r
Externí odkaz:
http://arxiv.org/abs/hep-ph/9805493
Publikováno v:
Phys.Rev. D57 (1998) 1591-1604
We compute the momentum dependence of the effective four quark interaction in QCD after integrating out the gluons. Our method is based on a truncation of exact renormalization group equations which should give reasonable results for momenta above th
Externí odkaz:
http://arxiv.org/abs/hep-ph/9708425
Existence and properties of the electroweak phase transition in the early universe depend strongly on the mass of the Higgs scalar M_H. There is presumably no true symmetry restoration at high temperature. Nevertheless, a first order phase transition
Externí odkaz:
http://arxiv.org/abs/hep-ph/9611462
We discuss the electroweak phase-transition in the early universe, using non-perturbative flow equations for a computation of the free energy. For a scalar mass above $\sim 70$ GeV, high-temperature perturbation theory cannot describe this transition
Externí odkaz:
http://arxiv.org/abs/hep-ph/9508352
Autor:
Bergerhoff, Bastian, Soff, Gerhard
Publikováno v:
Zeitschrift für Naturforschung A; November 1994, Vol. 49 Issue: 11 p997-1012, 16p
