6533b7cffe1ef96bd125852d
RESEARCH PRODUCT
Neutrinoless double beta decay in supersymmetry with bilinear R-parity breaking
José W. F. ValleMartin Hirschsubject
PhysicsNuclear and High Energy PhysicsParticle physicsFOS: Physical sciencesBilinear interpolationFísicaSupersymmetryFirst generationThird generationHigh Energy Physics - Phenomenologysymbols.namesakeHigh Energy Physics - Phenomenology (hep-ph)Double beta decayR-paritysymbolsFeynman diagramBeta (velocity)High Energy Physics::Experimentdescription
We reanalyze the contributions to neutrinoless double beta ($\znbb$) decay from supersymmetry with explicit breaking of R-parity. Although we keep both bilinear and trilinear terms, our emphasis is put on bilinear R-parity breaking terms, because these mimic more closely the models where the breaking of R-parity is spontaneous. Comparing the relevant Feynman diagrams we conclude that the usual mass mechanism of double beta decay is the dominant one. From the non-observation of $\znbb$ decay we set limits on the bilinear R-parity breaking parameters of typically a (few) 100 $keV$. Despite such stringent bounds, we stress that the magnitude of R-parity violating phenomena that can be expected at accelerator experiments can be very large, since they involve mainly the third generation, while $\znbb$ decay constrains only the first generation couplings.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-12-21 |