It has recently been shown that, in the framework of weak-scale softly broken supersymmetry, the existence of a Majorana neutrino inevitably implies a finite (B - L)-violating "Majorana" mass m̃M for scalar neutrinos. This leads to the splitting of the complex sneutrino field into two real fields separated in mass by m̃12 -m̃22 = 2|m̃M2. The existence of a finite Majorana sneutrino mass generates new contributions to neutrinoless double beta decay in Rp-conserving models, yielding constraints on m̃M. Furthermore, a nonvanishing m̃M gives rise to new processes potentially observable at future lepton colliders. In view of the existing low-energy constraints, it will be very difficult, albeit not impossible, to find positive signals for electron sneutrinos. For muon and tau sneutrinos, a dedicated search for Majorana masses has much better prospects. However, high luminosities seem to be an essential requirement for all accelerator experiments.
|Number of pages||7|
|Journal||Physics of Atomic Nuclei|
|Publication status||Published - Jun 1998|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics