Mainz 2004 – scientific programme

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T: Teilchenphysik

T 302: Teilchenastrophysik und Kosmologie

T 302.8: Talk

Tuesday, March 30, 2004, 17:45–18:00, HS III

Cosmological acceleration, varying couplings, and spacetime symmetries — •Ralf Lehnert — CENTRA, Departamento de Física, Universidade do Algarve, 8000-117 Faro, Portugal

In a cosmological context, candidate fundamental theories often contain spacetime-dependent scalar fields. This talk illustrates this fact within a simple supergravity cosmology and discusses the ensuing spacetime-symmetry violations. Our model also exhibits the observed late-time cosmological acceleration and leads to varying electromagnetic couplings.