Winter Mini Workshop on Gravity and Cosmology

Session

gravity theories

Jan 22, 2019, 9:00 AM

Faculty of Physics, University of Warsaw

3. On Lorentz-invariant massive spin-2 theories

Prof. Atsushi Naruko (Tohoku University)

1/22/19, 9:00 AM

gravity theories

In this talk, we construct Lorentz-invariant massive spin-2
theories in a flat space-time. Starting from the most general action of a massive spin-2 field whose Lagrangian contains up to quadratic in first derivatives of a field, we investigate new possibilities by using the Hamiltonian analysis. By imposing degeneracy of the kinetic matrix and the existence of subsequent constraints, we...

4. Is GR Unique?

Prof. Chunshan Lin (University of Warsaw)

1/22/19, 9:45 AM

gravity theories

Probably not. I will introduce some different gravity theories which are as good as GR in the sense that all of constraints are first class and therefore a graviton has only 2 polarisations and the structure of the theory at low energies is thus expected to be stable against quantum corrections.

10. New Weyl-invariant vector-tensor theory for the cosmological constant

Prof. Alexander Vikman (CEICO, Prague)

1/22/19, 11:00 AM

In arXiv:1811.09547 we introduced an interesting new Weyl-invariant and generally-covariant vector-tensor theory with higher derivatives. This theory can be induced by extending the mimetic construction to vector fields of conformal weight four. We demonstrated that in gauge-invariant variables this novel theory reduces to the Henneaux–Teitelboim description of the unimodular gravity. Hence,...

17. On spontaneous breaking of Weyl conformal geometry to Einstein gravity and its applications

Prof. Dumitru Ghilencea (IFIN Bucharest)

1/22/19, 11:45 AM

We investigate the spontaneous breaking of Weyl conformal geometry to Einstein gravity in the presence/absence of matter with non-minimal couplings and possible applications to model building beyond SM.