Zobrazeno 1 - 10
of 212
pro vyhledávání: '"Baacke, J."'
Publikováno v:
JCAP 0706:004,2007
We study the supersymmetric hybrid model near and after the end of inflation. As usual, we reduce the model to a purely scalar hybrid model on the level of the classical fields. But on the level of quantum fluctuations and their backreaction we take
Externí odkaz:
http://arxiv.org/abs/hep-th/0702009
Autor:
Baacke, J., Kevlishvili, N.
Publikováno v:
Nucl.Phys.B745:142-164,2006
We compute tunneling in a quantum field theory in 1+1 dimensions for a field potential $U(\Phi)$ of the asymmetric double well type. The system is localized initially in the ``false vacuum''. We consider the case of a {\em compact space} ($S_1$) and
Externí odkaz:
http://arxiv.org/abs/hep-th/0505118
Autor:
Baacke, J., Michalski, Stefan
We study the O(N) linear sigma model with spontaneous symmetry breaking at finite temperature in the framework of the two-particle point-irreducible (2PPI) effective action. We go beyond the Hartree approximation by including the two-loop contributio
Externí odkaz:
http://arxiv.org/abs/hep-ph/0312031
Autor:
Baacke, J., Michalski, S.
Publikováno v:
Phys.Rev. D67 (2003) 085006
We study the O(N) linear sigma model with spontaneous symmetry breaking, using a Hartree-like ansatz with a classical field and variational masses. We go beyond the Hartree approximation by including the two-loop contribution, the sunset diagram, usi
Externí odkaz:
http://arxiv.org/abs/hep-ph/0210060
Publikováno v:
Nucl.Phys. B649 (2003) 415-448
We investigate the out of equilibrium dynamics of global chiral supersymmetry at finite energy density. We concentrate on two specific models. The first is the massive Wess-Zumino model which we study in a selfconsistent one-loop approximation. We fi
Externí odkaz:
http://arxiv.org/abs/hep-ph/0110205
Autor:
Baacke, J., Michalski, S.
Publikováno v:
Phys.Rev.D65:065019,2002
We consider the out-of-equilibrium evolution of a classical condensate field and its quantum fluctuations for a scalar O(N) model with spontaneously broken symmetry. In contrast to previous studies we do not consider the large N limit, but the case o
Externí odkaz:
http://arxiv.org/abs/hep-ph/0109137
Publikováno v:
Phys.Lett. B520 (2001) 317-321
We consider an O(N) version of a massive, interacting, chiral supersymmetry model solved exactly in the large N limit. We demonstrate that the system approaches a stable attractor at high energy densities, corresponding to a non-perturbative state fo
Externí odkaz:
http://arxiv.org/abs/hep-ph/0011395
Autor:
Baacke, J., Sprenger, H.
Publikováno v:
Phys.Rev. D63 (2001) 094016
We compute the parton distributions for the chiral quark model. We present a new technique for performing such computations based on Green functions. This approach avoids a discretization of the spectrum. It therefore does not need any smoothing proc
Externí odkaz:
http://arxiv.org/abs/hep-ph/0011204
Autor:
Baacke, J., Heitmann, K.
Publikováno v:
Phys.Rev. D62 (2000) 105022
We consider the large-N $\Phi^4$ theory with spontaneously broken symmetry at finite temperature. We study, in the large-N limit, quantum states which are characterized by a time dependent, spatially homogenous expectation value of one of the field c
Externí odkaz:
http://arxiv.org/abs/hep-ph/0003317
Autor:
Baacke, J., Patzold, C.
Publikováno v:
Phys.Rev. D62 (2000) 084008
We derive the renormalized equations of motion and the renormalized energy-momentum tensor for fermions coupled to a spatially homogeneous scalar field (inflaton) in a flat FRW geometry. The fermion back reaction to the metric and to the inflaton fie
Externí odkaz:
http://arxiv.org/abs/hep-ph/9912505