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Constraining Lorentz-violating dark matter with galaxy satellites

Dario Bettoni
Nordic Institute for Theoretical Physics

Abstract
Lorentz symmetry is one of the most fundamental and solid symmetries of physics. However, there are several arguments by which such symmetry may not be exact with potentially important observable consequences. Although deviations are forced to be very small for standard model particles, there is more room for variations in the gravitational sector as well as in the interactions with dark matter.
In this talk, after presenting some general results, I will discuss the effects of a Lorentz violating vector field onto the dynamics of a dark matter satellite orbiting around its parental halo. In particular, I will highlight the observables features (form distortions in halo's shape to halo evaporation) and use Milky Way satellites as a way to place constraints on model's parameters.

2016 May 18, 10:30

IA/U.Lisboa
Faculdade de CiÍncias da Universidade de Lisboa (C6.2.51)
Campo Grande, 1749-016 Lisboa

Instituto de Astrof√≠sica e Ci√™ncias do Espa√ßo Universidade do Porto Faculdade de Ciências da Universidade de Lisboa
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia