Sweet Spot Supersymmetry

[摘要] We find that there is no supersymmetric flavor/CP problem, {mu}-problem, cosmological moduli/gravitino problem or dimension four/five proton decay problem in a class of supersymmetric theories with O(1) GeV gravitino mass. The cosmic abundance of the nonthermally produced gravitinos naturally explains the dark matter component of the universe. A mild hierarchy between the mass scale of supersymmetric particles and electroweak scale is predicted, consistent with the null result of a search for the Higgs boson at the LEP-II experiments. A relation to the strong CP problem is addressed. We propose a parametrization of the model for the purpose of collider studies. The scalar tau lepton is the next to lightest supersymmetric particle in a theoretically favored region of the parameter space. The lifetime of the scalar tau is of O(1000) seconds with which it is regarded as a charged stable particle in collider experiments. We discuss characteristic signatures and a strategy for confirmation of this class of theories at the LHC experiments.

[发布日期] 2007-06-06

[学科分类] 物理（综合）

[关键词] ABUNDANCE;DECAY;DIMENSIONS;HIGGS BOSONS;LIFETIME;NONLUMINOUS MATTER;PROTONS;SCALARS;SPARTICLES;SUPERSYMMETRY;TAU PARTICLES;UNIVERSE Phenomenology-HEP;HEPPH