2008/08/06 by Satoshi Shirai, Fuminobu Takahashi, Tsutomu T. Yanagida +2 · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.78.075003
published as Phys.Rev.D78:075003,2008 · 23 pages, 4 figures, 2 tables
arxiv created 2008/08/06 · openalex publication_date 2008/10/06 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Gauge mediation models have two drawbacks, that is, the so-called \ensuremathμ problem and a lack of predictability of the gravitino dark matter abundance. We show that conformal sequestering in the supersymmetry breaking sector offers attractive solutions to both problems. The correct mass scale of the \ensuremathμ and B_\ensuremathμ terms is generated by taking the gravitino mass of O(100) GeV. This opens up a possibility that a neutralino, instead of gravitino, is the lightest supersymmetric particle and a candidate for dark matter, even in the gauge mediation. Surprisingly, a large anomalous dimension of the supersymmetry breaking field can naturally realize the small stau and neutralino mass difference required for the coannihilation to work yielding the right abundance of the neutralino dark matter.