Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-04-14
Int.J.Mod.Phys.A25:5913-5922,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
References updated, and a Note Added
Scientific paper
10.1142/S0217751X10051207
We consider the so-called "eV seesaw" scenario, with right-handed Majorana mass $M_R$ at eV order, extended to four lepton generations. The fourth generation gives a heavy pseudo-Dirac neutral lepton, which largely decouples from other generations and is relatively stable. The framework naturally gives 3 active and 3 sterile neutrinos. We update a previous numerical analysis of a 3+3 study of the LSND anomaly, taking into account the more recent results from the MiniBooNE experiment. In particular, we study the implications for the third mixing angle $\mathrm{sin}^2\theta_{13}$, as well as CP violation. We find that current data do not seriously constrain more than one sterile neutrinos.
Hou Wei-Shu
Lee Fei-Fan
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