Gauge Extensions of the MSSM Revisited
arXiv:1212.0560 · doi:10.1103/PhysRevD.87.055011
Abstract
We study an extension of the Minimal Supersymmetric Standard Model with a gauge group breaking to . The extra wino has an enhanced gauge coupling to the SM-like Higgs boson and, if light, has a relevant impact on the weak scale phenomenology. The low energy Higgs quartic coupling is modified both by extra -term corrections and by a modification of its renormalization group evolution from high energies. At low values of , the latter effect may be dominant. This leads to interesting regions of parameter space in which the model can accommodate a 125 GeV Higgs with relatively light third generation squarks and an increased decay branching ratio, while still satisfying the constraints from electroweak precision data and Higgs vacuum stability.
21 pages, 5 figures. References updated
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