THERMAL VACUUM RADIATION IN SPONTANEOUSLY BROKEN SECOND-QUANTIZED THEORIES ON CURVED PHASE SPACES OF CONSTANT CURVATURE

Thermal Vacuum Radiation in Spontaneously Broken Second-Quantized Theories on Curved Phase Spaces of Constant Curvature

We construct second-quantized (field) theories on coset spaces of pseudo-unitary groups U(N+, N−). The existence of degenerated quantum vacua (coherent states of zero modes) leads to a breakdown of the original pseudo-unitary symmetry. The action of some spontaneously broken symmetry transformations destabilize the vacuum and make it to radiate. We study the structure of this thermal radiation ...

On the Possibility of Second-Order Phase Transitions in Spontaneously Broken Gauge Theories

Massive gauge-invariant field theories on spaces of constant curvature

Gauge fields of mixed symmetry, corresponding to arbitrary representations of the local Lorentz group of the background spacetime, arise as massive modes in compactifications of superstring theories. We describe bosonic gauge field theories on constant curvature spaces whose fields are in irreducible representations of the general linear group corresponding to Young tableaux with two columns. T...

propagators in spontaneously broken gauge theories

Contrary to common belief, the longitudinal vector meson and scalar meson propagators have very different forms in spontaneously broken gauge theories. We choose the Abelian-Higgs model as an example and show that the longitudinal vector meson and scalar meson propagators have double poles by an extensive use of the Ward-Takahashi identities. PACS numbers: 11.15.-q, 11.30.Qc, 12.15.-y Typeset u...

Goldstino Decoupling in Spontaneously Broken Supergravity Theories

If the gravitino is sufficiently light and stable it will behave as an effective massless neutrino species at the time of nucleosynthesis. Depending on the temperature at which it decouples from the thermal bath in the early universe, the gravitino mass will be bounded by the primordial 4He abundance. Assuming a conservative estimate that the number of neutrino families, Nν < 3.6, superlight gr...