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Simple approach to the hierarchy problem
DOI:10.1002/prop.201000005.png)
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We show that gauge-singlet real scalars added to the Standard Model can both soften the little hierarchy problem and offer a candidate for Dark Matter. Masses of the scalars are in the 1 - 3 TeV range, depending on the Higgs boson mass and the number of singlets present. If the scalars couple to the Majorana mass term for right-handed neutrinos then one neutrino must be massless. The mixing angles are consistent with the tri-bimaximal mixing. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Keyword:
Scalars
hierarchy
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