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Actually, what Professor Krauss says is not completely accurate. The inclusion of supersymmetry forces us go from one Higgs field related particles to five: three neutral ones, a charged one and its antiparticle. He mentions the number two because only one of the additional four Higgs bosons has exactly the same properties as the "first" Higgs boson (it has nothing to do with the "doubling" of particles due to supersymmetry). All those Higgs particles in supersymmetric theories are not expected to be at the same mass scale - there is usually one light Higgs below ~ 130 GeV, while the others are generically significantly heavier.
Permalink Tue, 13 Dec 2011 10:34:17 UTC | #898549