String phenomenology on twisted tori

par David Andriot (Max Planck Institute for Gravitational Physics, Potsdam)

jeudi 11 févr. 2016, 11:00 → 12:00 Europe/Paris

Petit Amphi (Annecy-le-Vieux)

When trying to relate string theory to four-dimensional observable physics, the starting ten-dimensional space-time is usually split as a four-dimensional Minkowski or de Sitter space-time, times a six-dimensional compact manifold M. In this talk I will focus on M being a twisted torus, also known as nil- or solvmanifold. In addition of being classified and easy to handle, most of these manifolds are negatively curved, which is advantageous for phenomenology. I will first present and comment on newly discovered Minkowski backgrounds. I will then report on a cosmological inflation mechanism proposed in this context, and on the difficulties in its concrete realisation. I will finally discuss dimensional reduction on such manifolds, and their use in simple extra dimensions models for dark matter.