Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-08-18
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, Latex, 1 figure included (Talk presented at the workshop Valencia 95)
Scientific paper
The existence of a light singlet fermion mixed with the electron neutrino is hinted by the simultaneous explanation of various neutrino anomalies. We show that supersymmetry can provide a natural framework for the existence and the desired properties of such a fermion. Quasi Goldstone fermions (QGF) of spontaneously broken global symmetries like the Peccei-Quinn symmetry or lepton number can mix properly with the neutrinos provided the presence of the R-parity breaking term $\e LH_2$. The lightness of QGF can be a consequence of non-minimal K\"ahler potentials like that of no-scale supergravity. In order to keep R-parity, such a sterile component has to be placed in a new singlet superfield with no vacuum expectation value. In the context of the standard seesaw mechanism the lightness of such a singlet can be understood by imposing a $R$-symmetry.
Chun Eung Jin
Smirnov Alexei Yu.
Yoshipura A. S.
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