Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-02-25
Phys.Lett.B486:255-262,2000
Physics
High Energy Physics
High Energy Physics - Phenomenology
1 reference added, enlarged discussion of loops
Scientific paper
10.1016/S0370-2693(00)00781-4
Neutrinoless double beta ($\znbb$) decay is considered within bilinear R-parity breaking supersymmetry, including the full one-loop corrections to the neutrino-neutralino mass matrix. Expected rates for $\znbb$ decay in this model are discussed in light of recent atmospheric and solar neutrino data. We conclude that (a) tree-level calculations for $\znbb$ decay within the bilinear model are not reliable in the range of parameters preferred by current solar and atmospheric neutrino problems. And (b) if the solar and atmospheric neutrino problems are to be solved within bilinear R-parity violating SUSY the expected rates for $\znbb$ decay are very low; the effective Majorana neutrino mass at most 0.01 eV and typical values being one order of magnitude lower. Observing $\znbb$ decay in the next round of experiments therefore would rule out the bilinear R-parity violating supersymmetric model as an explanation for solar and atmospheric neutrino oscillations, as well as any hierarchical scheme for neutrino masses, unless new neutrino interactions are present.
Hirsch Manfred
Romão Jorge C.
Valle Jose W. F.
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