Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-12-10
JHEP 0803:009,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
22 pages, 6 figures. Version to be published at JHEP
Scientific paper
10.1088/1126-6708/2008/03/009
Neutrino masses may be generated by the VEV of an $SU(2)_L$ Higgs triplet. We assume that the doubly charged component of such a triplet has a mass in the range of several 100 GeV, such that it is accessible at LHC. Its decay into like-sign leptons provides a clean experimental signature, which allows for a direct test of the neutrino mass matrix. By exploring the branching ratios of this decay into leptons of various flavours, we show that within this model the type of the neutrino mass spectrum (normal, inverted or quasi-degenerate) might actually be resolved at the LHC. Furthermore, we show that within the Higgs triplet model for neutrino mass the decays of the doubly charged scalar into like-sign lepton pairs at the LHC provide a possibility to determine the Majorana CP phases of the lepton mixing matrix.
Garayoa Julia
Schwetz Thomas
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