Towards absolute neutrino masses

Details Towards absolute neutrino masses Towards absolute neutrino masses

2006-11-15

arxiv.org/abs/hep-ph/0611210v1

Nucl.Phys.Proc.Suppl.168:23-28,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Invited talk at the NOW2006 Workshop, Otranto, Italy, September 2006

Scientific paper

10.1016/j.nuclphysbps.2007.02.01

Various ways of determining the absolute neutrino masses are briefly reviewed and their sensitivities compared. The apparent tension between the announced but unconfirmed observation of the $0\nu\beta\beta$ decay and the neutrino mass upper limit based on observational cosmology is used as an example of what could happen eventually. The possibility of a ``nonstandard'' mechanism of the $0\nu\beta\beta$ decay is stressed and the ways of deciding which of the possible mechanisms is actually operational are described. The importance of the $0\nu\beta\beta$ nuclear matrix elements is discussed and their uncertainty estimated.

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