Speaker
Martin Holthausen
(Max Planck Institut für Kernphysik, Heidelberg)
Description
Under the assumption of classical conformal invariance, we study the Coleman-Weinberg symmetry breaking mechanism in the minimal left-right symmetric model. This model is attractive as it provides a natural framework for small neutrino masses and the restoration of parity as a good symmetry of nature. We find that, in a large fraction of the parameter space, the parity symmetry is maximally broken by quantum corrections in the Coleman-Weinberg potential, which are a consequence of the conformal anomaly. As the left-right symmetry breaking scale is connected to the Planck scale through the logarithmic running of the dimensionless couplings of the scalar potential, a large separation of the two scales can be dynamically generated. The symmetry breaking dynamics of the model was studied using a renormalization group analysis. Electroweak symmetry breaking is triggered by the breakdown of left-right symmetry, and the left-right breaking scale is therefore expected in the few TeV range. The phenomenological implications of the symmetry breaking mechanism are discussed.
Authors
Manfred Lindner
(Max Planck Institut für Kernphysik, Heidelberg)
Martin Holthausen
(Max Planck Institut für Kernphysik, Heidelberg)
Michael A. Schmidt
(Institute for Particle Physics Phenomenology, University of Durham, Durham)
