Conveners
Phase Transitions/Models
- Kuver Sinha (University of Oklahoma)
A common assumption about the early universe is that it underwent an electroweak phase transition (EWPT). Though the standard model (SM) is able to restore the electroweak symmetry through a smooth cross over PT, we require a strongly first-order PT to ensure electroweak baryogenesis, requiring us to look at new physics beyond the SM. The simplest case to extend the SM is to add a real singlet...
In this talk, I am going to explore the possibility that electroweak phase transition may never occur in the early universe. It is known that the symmetries of some scalar models are not restored at high temperature, or some symmetries that are unbroken at low temperature becomes broken at higher temperature. These phenomena are known as Symmetry Non-restoration (SNR) and Inverse Symmetry...
Anomaly-mediated supersymmetry breaking (AMSB) models seem to have become increasingly implausible due to 1. difficulty in generating a Higgs mass $m_h$ $\sim$ 125 GeV, 2. typically unnatural superparticle spectra characterized by a large superpotential mu term and 3. the possibility of a wino-like lightest SUSY particle (LSP) as dark matter now seems to be excluded. In...
