Supersymmetry without the little hierarchy

Journal Article · Fri May 01 04:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.095003· OSTI ID:21308445

Bellazzini, Brando ^[1]; Csaki, Csaba ^[1]; Delgado, Antonio ^[2]; Weiler, Andreas ^[1]

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1. Institute for High Energy Phenomenology, Newman Laboratory of Elementary Particle Physics, Cornell University, Ithaca, New York 14853 (United States)
2. 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, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 79; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COUPLING
GEV RANGE 100-1000
GOLDSTONE BOSONS
HIGGS BOSONS
HIGGS MODEL
MASS
MATTER
NEUTRINOS
QUANTUM NUMBERS
STANDARD MODEL
SUPERSYMMETRY