Spontaneous symmetry breaking vacuum energy in cosmology

Vacuum orbit and spontaneous symmetry breaking in hyperbolic sigma - models

We present a detailed study of quantized noncompact, nonlinear SO(1, N) sigma-models in arbitrary space-time dimensions D ≥ 2, with the focus on issues of spontaneous symmetry breaking of boost and rotation elements of the symmetry group. The models are defined on a lattice both in terms of a transfer matrix and by an appropriately gauge-fixed Euclidean functional integral. The main results in ...

Vacuum Symmetry Breaking

We give a general SU(2)L × SU(2)R ×U(1)EM sigma model with external sources, dynamical breaking and spontaneous vacuum symmetry breaking, and present the general formulation of the model. It is found that σ and π without electric charges have electromagnetic interaction effects coming from their internal structure. A general Lorentz transformation relative to external sources Jgauge = (JAμ , JA...

Supersymmetry and gauge symmetry breaking with naturally vanishing vacuum energy

We review the construction of N = 1 supergravity models where the Higgs and super-Higgs effects are simultaneously realized, with naturally vanishing classical vacuum energy and goldstino components along gauge-non-singlet directions: this situation is likely to occur in the effective theories of realistic string models. Invited talk presented at SUSY–95, Palaiseau, France, 15–19 May 1995 CERN-...

Nonperturbative Spontaneous Symmetry Breaking

One of the most astonishing results of quantum field theory is spontaneous symmetry breaking. One can say that it is the situation when something arises from the quantization. This means that on the quantum level one has something that was not present on the classical level. Coleman and Weinberg [1] write : “ . . . higher-order effects may qualitatively change the character of a physical theory...

Spontaneous Symmetry Breaking