Skip navigation.
Logo APC
 
 

Théorie

Fundamental Physics and Nuclear Structure

Orateur: 
Jonathan Engel
Home Institute: 
North Carolina State University
Lieu: 
646 A-Mondrian
Horaire: 
Tuesday, 11. March 2014 - 14:00

Much of the fundamental physics we have learned about in recent years was uncovered in low-energy experiments.  More low-energy experiments are in progress and many require that nuclear effects be untangled from the fundamental physics we are trying to probe.  I review the issue and attempts to understand the relevant nuclear physics in three kinds of experimental searches: for neutrinoless double beta decay,  for new sources of CP violation through nonzero atomic electric dipole moments, and for  dark matter particles through scattering from ordinary matter.

Charged Chern-Simons AdS black holes

Orateur: 
Nelson Merino
Lieu: 
483A Malevitch
Horaire: 
Tuesday, 18. February 2014 - 14:00

We found the most general spherically symmetric, static black hole solution for Chern-Simons gravity based on a simple extension of the AdS algebra, that is, AdS x U(1). The corresponding gauge connection contains gravitational fields describing a Riemann-Cartan manifold with electromagnetic matter field. When the electromagnetic field and some components of the torsion are switched off, solution reproduces the known ones found in the literature. For other choices of the torsion components, our solution is physically different from the already known ones.

Cubic interactions and Symmetries of Higher-spin field theories

Orateur: 
Euihun Joung
Home Institute: 
APC
Lieu: 
483A Malevitch
Horaire: 
Tuesday, 4. February 2014 - 14:00
The deformations of higher-spin symmetries induced by cubic interactions of symmetric massless bosonic fields will be analyzed within the metric-like formalism. In particular, I will identify a class of couplings which leave the gauge algebra Abelian but deform one (out of three) gauge transformation, and another class of couplings which deform all three gauge transformations in (A)dS but only two in the flat-space limit. The former class is related to higher-spin algebra multiplets (representations of the global algebra).

Localized features in the primordial spectra from heavy physics

Orateur: 
Ryo Saito
Lieu: 
483A Malevitch
Horaire: 
Tuesday, 14. January 2014 - 14:00

Primordial density fluctuations provide one of a few ways to probe the high energy physics behind inflation. In this talk, we discuss the possibility that we could obtain some hints of the heavy physics during inflation by analyzing local features in the spectra of the primordial fluctuations.

Shape Dynamics: a new tool for General Relativity, Cosmology and Quantum Gravity

Orateur: 
Flavio Mercati
Home Institute: 
Perimeter Institute
Lieu: 
483A Malevitch
Horaire: 
Tuesday, 28. January 2014 - 14:00

 

On renormalized AdS action and Critical Gravity

Orateur: 
Rodrigo Olea
Lieu: 
483A Malevitch
Horaire: 
Tuesday, 21. January 2014 - 14:00

It can be shown that the renormalized action for AdS gravity in even spacetime dimensions is equivalent --on shell-- to a polynomial of the Weyl tensor, whose first non-vanishing term is Weyl^2. Remarkably enough, the coupling of this last term coincides with the one that appears in Critical Gravity

Oscillations between active and sterile neutrinos at the primordial nucleosynthesis epoch

Orateur: 
Daniela Kirilova
Home Institute: 
Institute of Astronomy, Bulgarian Academy of Sciences
Lieu: 
Klimt 366A
Horaire: 
Monday, 2. December 2013 - 15:00

TBA

Orateur: 
Daniela Kirilova
Lieu: 
454A-Luc Valentin
Horaire: 
Friday, 15. November 2013 - 14:30

Thermodynamics of a Black Hole with Moon

Orateur: 
Alexandre Le Tiec
Lieu: 
483A Malevitch
Horaire: 
Tuesday, 17. December 2013 - 14:00

The Cosmological side of Massive Gravity

Orateur: 
Luigi Pilo
Lieu: 
483A Malevitch
Horaire: 
Tuesday, 26. November 2013 - 14:00
I review the status massive gravity. Besides purely theoretical consideration, the study of massive versions of general relativity is motivated as a model of dark energy. The navigation through the various models will be guided by two basic principles: reproducing small scale tests of gravity (solar system and bellow) and the existence of sensible cosmological solutions. Interestingly, there is as general construction of basically all massive gravity theories with five degrees of freedom or less based on Hamiltonian analysis.
Syndicate content