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    TH Thursday Seminar

    Recent CMB data and the leptonic asymmetry

    by Julien LESGOURGUES (Annecy)

    → Europe/Zurich
    TH Auditorium (CERN)

    TH Auditorium

    CERN
    Description
    The Boomerang and Maxima results give an estimate of unprecedented precision of the Cosmic Microwave Background anisotropies on sub-degree scales. A puzzling feature for theoretical cosmology is the low amplitude of the second acoustic peak, since it favors a high baryon density, conflicting with the standard scenario of Big Bang Nucleosynthesis. I will show that a simple way to solve the discrepancy is to allow for a leptonic asymmetry of order one for cosmic neutrinos.