Graviton non-masslessness

M111 in Maths Building, UCT
Fri, 24/04/2015 - 13:00 - 14:00
Lavinia Heisenberg (Nordita, KTH Royal Institute of Technology and Stockholm University)

If the particle carrier of the gravitational force had a mass, gravity could behave differently from GR on cosmological
scales thereby potentially tackling the dark energy and cosmological constant problems. In this context the dRGT theory
will be introduced. After discussing the cosmological consequences, i will concentrate on the radiative corrections to
the potential interactions. This will play an important role for the naturalness of the theory. Furthermore, I will address
the question of how the matter fields can be consistently coupled in massive (bi-)gravity.