Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-06-10
Phys.Rev. D72 (2005) 033016
Physics
High Energy Physics
High Energy Physics - Phenomenology
35 pages, 12 figures. Comments and references added. To appear in PRD
Scientific paper
10.1103/PhysRevD.72.033016
We discuss to what extent future precision measurements of neutrino mixing observables will influence the information we can draw from a measurement of (or an improved limit on) neutrinoless double beta decay. Whereas the Delta m^2 corresponding to solar and atmospheric neutrino oscillations are expected to be known with good precision, the parameter theta_{12} will govern large part of the uncertainty. We focus in particular on the possibility of distinguishing the neutrino mass hierarchies and on setting a limit on the neutrino mass. We give the largest allowed values of the neutrino masses which allow to distinguish the normal from the inverted hierarchy. All aspects are discussed as a function of the uncertainty stemming from the involved nuclear matrix elements. The implications of a vanishing, or extremely small, effective mass are also investigated. By giving a large list of possible neutrino mass matrices and their predictions for the observables, we finally explore how a measurement of (or an improved limit on) neutrinoless double beta decay can help to identify the neutrino mass matrix if more precise values of the relevant parameters are known.
Choubey Sandhya
Rodejohann Werner
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