D6 Family Symmetry and Cold Dark Matter at LHC

Details D6 Family Symmetry and Cold Dark Matter at LHC D6 Family Symmetry and Cold Dark Matter at LHC

2006-10-06

arxiv.org/abs/hep-ph/0610072v2

Phys.Rev.D75:033001,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 7 figures

Scientific paper

10.1103/PhysRevD.75.033001

We consider a non-supersymmetric extension of the standard model with a family symmetry based on D6 Z2 Z2, where one of Z2's is exactly conserved. This Z2 forbids the tree-level neutrino masses and simultaneously ensures the stability of cold dark matter candidates. From the assumption that cold dark matter is fermionic we can single out the D6 singlet right-handed neutrino as the best cold dark mater candidate. We find that an inert charged Higgs with a mass between 300 and 750 GeV decays mostly into an electron (or a positron) with a large missing energy, where the missing energy is carried away by the cold dark matter candidate. This will be a clean signal at LHC.

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