Fourth Generation Majorana Neutrinos

Details Fourth Generation Majorana Neutrinos Fourth Generation Majorana Neutrinos

2011-04-13

arxiv.org/abs/1104.2465v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 11 figures

Scientific paper

We investigate the possibility of a fourth sequential generation in the lepton sector. Assuming neutrinos to be Majorana particles and starting from a recent - albeit weak - evidence for a non-zero admixture of a fourth generation neutrino from fits to weak lepton and meson decays we discuss constraints from neutrinoless double beta decay, radiative lepton decay and like-sign dilepton production at hadron colliders. Also an idea for fourth generation neutrino mass model building is briefly outlined. Here we soften the large hierarchy of the neutrino masses within an extradimensional model that locates each generation on different lepton number violating branes without large hierarchies.

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