Chair: M. Lattanzi
Heinrich Päs (Universität Dortmund)
We suggest a structure for the vacuum comprised of a network of tightly knotted/linked flux tubes formed in a QCD-like cosmological phase transition and show that such a network can drive cosmological inflation. As the network can be topologically stable only in three space dimensions, this scenario provides a dynamical explanation for the existence of exactly three large spatial dimensions in...
Tomasz Krajewski (University of Warsaw)
The study of the renormalisation group improved effective potential of the Standard Model has revealed the existence of the local minima at strengths of the order of 10^10 GeV. If the Standard Model is valid for very high energy scales, then the possibility of the production of cosmological domain walls in the early Universe occurs. We investigated the dynamics of the network of domain walls...
Sotirios Karamitsos (University of Manchester)
Inflation has been very successful as a generic explanation of the origin of cosmological anisotropies. However, the development of more sophisticated inflationary models, such as scalar-curvature theories, has led to challenges in extracting predictions for observable quantities. With the aim of obtaining predictions from inflationary models in a concise and straightforward manner, I will...
Stefano Di Vita (DESY)
We show that the Standard Model vacuum can be stabilized if all particle propagators are non-minimally coupled to gravity. This is due to a Higgs-background dependent redefinition of the Standard Model fields: in terms of canonical variables and in the large Higgs field limit, the quantum fluctuations of the redefined fields are suppressed by the Higgs background. Thus, in this regime, quantum...
20. Aspects of perturbativity, vacuum stability and inflation in the light of recent diphoton excess
Mansi Dhuria (Physical Research Laboratory, Ahemdabad)
The recent observation of the 750 GeV diphoton excess at 13 TeV LHC has motivated many scenarios of physics beyond the Standard Model. In this talk, we will discuss the observation that many models which explain the observed excess tend to get strongly coupled well below the Planck scale. We will then present the possibility of simple BSM scenario involving colored vector-like fermions with...