Masses of Majorana-like sneutrinos in neutrinoless double beta decay and at future colliders

M. Hirsch, H. V. Klapdor-Kleingrothaus, St Kolb, S. Kovalenko

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)991-997
Number of pages7
JournalPhysics of Atomic Nuclei
Volume61
Issue number6
Publication statusPublished - Jun 1998
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics

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