Talk detail

Participant	Lattanzi, Massimiliano
Institution	Università di Ferrara - Via Giuseppe Saragat - Ferrara - - Italy

Session	DM3	Accepted	Yes	Order	99	Time
Talk	Poster abstract	Title	Cosmological Constraints On Majoron-Neutrino Interactions
Coauthors	Forastieri, Francesco; Lattanzi, Massimiliano; Natoli, Paolo
Abstract	Neutrino masses can be produced from the spontaneous violation of an ungauged lepton number symmetry. In this case, a Nambu-Goldstone boson, the Majoron, appears. The Majoron could mediate non-standard interactions between neutrinos that would affect the evolution of perturbations in the neutrino fluid. In my talk I will show how cosmological observations, especially those of the anisotropies of the cosmic microwave background made by the Planck satellite, can be used to constrain the Majoron-neutrino coupling. In possible, I will also discuss the impact of other astrophysical observations, like those of SN1987A, on these constraints.
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