Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-02-03
Erratum-ibid.D79:079901,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, 4 figures
Scientific paper
10.1103/PhysRevD.79.055023
In models where the breaking of lepton number is spontaneous a massless Goldstone boson, the Majoron ($J$), appears. We calculate the theoretically allowed range for the branching ratios of Majoron emitting charged lepton decays, such as Br($\mu \to e J$) and Br($\mu \to e J \gamma$), in a supersymmetric model with spontaneous breaking of R-parity. Br($\mu\to eJ$) is maximal in the same region of parameter space for which the lightest neutralino decays mainly invisibly. A measurement of Br($\mu\to eJ$) thus potentially provides information on R-parity violation complementary to accelerator searches. We also briefly discuss existing bounds and prospects for future improvements on the Majoron coupling to charged leptons.
Hirsch Manfred
Meyer Johan
Porod Werner
Vicente Avelino
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