MODEL INDEPENDENT CONSTRAINTS OF THE AVERAGED NEUTRINO MASSES REVISITED

Two-loop-induced neutrino masses: A model-independent perspective

New Constraints on Neutrino Masses from Cosmology

By combining data from cosmic microwave background (CMB) experiments (including the recent WMAP third year results), large scale structure (LSS) and Lymanα forest observations, we derive upper limits on the sum of neutrino masses of Σmν < 0.17eV at 95% c.l.. We then constrain the hypothesis of a fourth, sterile, massive neutrino. For the 3 massless + 1 massive neutrino case we bound the mass of...

Constraints on neutrino masses from leptogenesis models

Upper bounds on the CP asymmetry relevant for leptogenesis are reexamined and found weaker than in previous literature, both for hierarchical and for quasi-degenerate righthanded neutrinos. Successful leptogenesis implies the usual lower bound on right-handed neutrino masses, and an upper bound on left-handed neutrino masses (which we obtain to be 0.15 eV at 3σ) only if right-handed neutrinos a...

Cosmological Constraints on Neutrino Masses and Mixings

The bounds on neutrino masses and mixing that follows from the data on light element abundances, large scale structure formation, and angular fluctuations of cosmic microwave background radiation are analyzed. The role of neutrino oscillations in BBN and the bounds on cosmological lepton asymmetry are discussed.

A Model for Neutrino Masses

I present a model for neutrino masses based on a hypothesis proposed by Friedberg and Lee. Invited talk presented at the IV International Workshop on Neutrino Oscillations, April 15-18 (2008) Venice, Italy 1 Prelude I am delighted to be giving a talk here in Italy on this very special day, April 15, Leonardo da Vinci’s birthday. Through my talk, I will turn to him for guidance and understanding...