FISICA A TORINO

Neutrinos and the Cosmological Puzzles

Pasquale Di Bari
(MPI, Munich)

Abstract
During last years, the `\Lambda<b>CDM</b>' model emerged as a minimal way to understand all cosmological observations, such that it is often referred to as the "Standard Model of cosmology", with most of the involved parameters measured within a 10% precision. However, against this robust experimental situation, there is a clear clash with the Standard Model of particle physics, that cannot explain many of the features of the \Lambda\text{CDM} model. Therefore, we have today four challenging cosmological puzzles that seem to claim for new physics: (i) the matter-antimatter asymmetry of the Universe; (ii) the nature of Dark Matter; (iii) the acceleration of the Universe; (iv) the nature of Inflation. I will discuss how neutrino physics suggests interesting solutions to some of the cosmological puzzles. A particulary attractive example is represented by leptogenesis for the explanation of the matter-anti matter asymmetry of the Universe. The recent discovery of flavor effects opens new prospects for testing leptogenesis in neutrino mixing.

Friday, 8 June 2007, at 14:30, Aula Wataghin



Carlo Giunti / giunti@to.infn.it
Last update: Fri 8 Jun 2007, 11:46:01 UTC