Friday, March 30, 2012

1110.3037 (Martin Hirsch et al.)

Hefty MSSM-like light Higgs in extended gauge models    [PDF]

Martin Hirsch, Michal Malinsky, Werner Porod, Laslo Reichert, Florian Staub
It is well known that in the MSSM the lightest neutral Higgs h^0 must be, at the tree level, lighter than the Z boson and that the loop corrections shift this stringent upper bound up to about 130 GeV. Extending the MSSM gauge group in a suitable way, the new Higgs sector dynamics can push the tree-level mass of h^0 well above the tree-level MSSM limit if it couples to the new gauge sector. This effect is further pronounced at the loop level and h^0 masses in the 140 GeV ballpark can be reached easily. We exemplify this for a sample setting with a low-scale U(1)_R x U(1)_B-L gauge symmetry in which neutrino masses can be implemented via the inverse seesaw mechanism.
View original: http://arxiv.org/abs/1110.3037

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