Natural relations among physical observables in the neutrino mass matrix
Abstract
We find all possible relations among physical observables arising from neutrino mass matrices that describe in a natural way the currently observed pattern (tan23 and tan12 large, dm2Sun/dm2Atm and tan13 small) in terms of a minimum number of parameters. Natural here means due only to the relative smallness (vanishing) of some parameters in the relevant lagrangian, without special relations or accidental cancellations among them.
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