Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-12-08
Phys.Rev.D81:053006,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages, 3 figures, 6 tables; PRD version
Scientific paper
10.1103/PhysRevD.81.053006
New models have recently been proposed in which a second Higgs doublet couples only to the lepton doublets and right-handed neutrinos, yielding Dirac neutrino masses. The vacuum value of this second "nu-Higgs" doublet is made very small by means of a very softly-broken $Z_2$ or U(1) symmetry. The latter is technically natural and avoids fine-tuning and very light scalars. We consider a supersymmetric version of this model, in which two additional doublets are added to the MSSM. If kinematically allowed, the decay of the heavy MSSM scalar into charged nu-Higgs scalars will yield dilepton events which can be separated from the W-pair background. In addition, the nu-Higgsinos can lead to very dramatic tetralepton, pentalepton and hexalepton events which have negligible background and can be detected at the LHC and the Tevatron.
Marshall Gardner
McCaskey Mathew
Sher Marc
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