Phase transition and vacuum stability in the classically conformal B–L model
TLDR
In this article, the impact of the minimal extension of the Standard Model on the dynamics of the electroweak symmetry breaking and derive its gravitational wave signature is analyzed, with particular attention paid to the problem of vacuum stability and to the role of the QCD phase transition in part of the considered parameter space.Abstract:
Within classically conformal models, the spontaneous breaking of scale invariance is usually associated to a strong first order phase transition that results in a gravitational wave background within the reach of future space-based interferometers. In this paper we study the case of the classically conformal gauged B–L model, analysing the impact of this minimal extension of the Standard Model on the dynamics of the electroweak symmetry breaking and derive its gravitational wave signature. Particular attention is paid to the problem of vacuum stability and to the role of the QCD phase transition, which we prove responsible for concluding the symmetry breaking transition in part of the considered parameter space. Finally, we calculate the gravitational wave signal emitted in the process, finding that a large part of the parameter space of the model can be probed by LISA.read more
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References
More filters
Journal ArticleDOI
A new type of isotropic cosmological models without singularity
TL;DR: In this paper, the Einstein equations with quantum one-loop contributions of conformally covariant matter fields are shown to admit a class of nonsingular isotropic homogeneous solutions that correspond to a picture of the universe being initially in the most symmetric (de Sitter) state.
Journal ArticleDOI
Neutrino Mass and Spontaneous Parity Nonconservation
TL;DR: In weak-interaction models with spontaneous parity nonconservation, this article obtained the following formula for the neutrino mass, valid for each lepton generation, which relates the maximality of observed parity non-conservation at low energies to the smallness of neutrinos masses.
Journal ArticleDOI
μ→eγ at a rate of one out of 109 muon decays?
TL;DR: In this paper, it was shown that lepton number conservation, purely left-handed charged weak currents and vanishing neutrino masses are a limiting case of a parity symmetric SU2L × SUR × U2V gauge theory.