Supersymmetry without the little hierarchy
- Institute for High Energy Phenomenology, Newman Laboratory of Elementary Particle Physics, Cornell University, Ithaca, New York 14853 (United States)
- Department of Physics, University of Notre Dame, Indiana 46556 (United States)
We propose a simple gauge extension of the minimal supersymmetric standard model, where the fine-tuning in the Higgs mass parameters is highly reduced. The Higgs boson is insensitive to high energies because of supersymmetry and also because it is a pseudo-Goldstone boson of a global symmetry (referred to as 'double protection' or 'super-little Higgs' mechanism). A large shift in the Higgs quartic self-coupling is obtained via a nondecoupling D term coming from an extra gauge group, resulting in a Higgs that can be as heavy as 135 GeV with a tuning milder than 10%. With an appropriate choice of quantum numbers one can achieve that the additional quartic is generated without a corresponding shift in the Higgs mass, thus preserving the double protection of the Higgs. The model predicts the existence of several top-partner fermions one of which can be as light as 700 GeV, while the ordinary minimal supersymmetric standard model states could be as light as 400 GeV. In addition to many new particles in the multi-TeV range there would also be an axionlike state very weakly coupled to standard model matter, which could be in the sub-GeV regime, and sterile neutrinos, which could be light.
- OSTI ID:
- 21308445
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 79, Issue 9; Other Information: DOI: 10.1103/PhysRevD.79.095003; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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