22-24 May 2013
Physics Department, University "La Sapienza", Roma, Italy
Europe/Rome timezone

Cosmological and astrophysical constraints on majoron dark matter

22 May 2013, 15:40
20m
Aula Edoardo Amaldi (first floor) (Physics Department, University "La Sapienza", Roma, Italy)

Aula Edoardo Amaldi (first floor)

Physics Department, University "La Sapienza", Roma, Italy

Speaker

Dr Massimiliano Lattanzi (Università di Ferrara)

Description

In my talk I will explore the possibility that the dark matter is related to the origin of neutrino masses. In fact, neutrino masses could arise from spontaneous breaking of ungauged lepton number and the resulting Goldstone boson, the majoron, may pick up a mass due to gravity and play the role of dark matter. I will first examine the cosmological constraints on the majoron density and lifetime. Then I will show the X- and gamma-ray constraints on the (subdominant) majoron decay to photons. Finally, I will compare these observational constraints to the predictions of different realizations of a general majoron see-saw model.

Primary author

Dr Massimiliano Lattanzi (Università di Ferrara)

Co-authors

Prof. José Valle (Instituto de Física Corpuscular - CSIC/Univ. de Valencia) Dr Mariam Tórtola (Instituto de Física Corpuscular - CSIC/Univ. de Valencia) Dr Signe Riemer-Sorensen (University of Queensland, Brisbane)

Presentation Materials

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