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9101 1505291812

What does Bayes have to say about tensions in cosmology and neutrino mass hierarchy?

  • Date: Sep 22, 2017
  • Time: 14:00 - 15:00
  • Speaker: Licia Verde (ICREA & ICC Universidad de Barcelona)
  • Location: MPA
  • Room: Large Seminar Room E 0.11
  • Host: MPA
Abstract: The Bayesian approach has been the standard one in cosmology for the analysis of all major recent datasets. I will present a Bayesian approach to two open issues. One is the tension between different data sets and in particular the value of the Hubble constant inferred from CMB measurement and directly measured in the local Universe. It can be used as a tool to look for systematic errors and/or for new physics. The other one is about neutrino mass ordering. Cosmology, in conjunction with neutrino oscillations results, has already indicated that the mass ordering is hierarchical. A Bayesian approach enables us to determine the odds of the normal vs inverted hierarchy. I will discuss caveats and implications of this.

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