2010/02/11 by Daniel Feldman, Gordon Kane, Ran Lu +2
Physics and Astronomy · #Astrophysics #CMB cold spot #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Gaugino #Gluino #Gravitino #Hidden sector #Light dark matter #Luminosity #Particle physics #Particle physics theoretical and experimental studies #Physics #Scalar field dark matter #Supergravity #Supersymmetry #hep-ph
paper · pdf · doi:10.1016/j.physletb.2010.03.055
published as Phys.Lett.B687:363-370,2010 · 2 columns, 9 pages, 5 figure captions
arxiv created 2010/02/11 · openalex publication_date 2010/03/22 · arxiv updated 2010/04/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Motivated by specific connections to dark matter signatures, we study the prospects of observing the presence of a relatively light gluino whose mass is in the range ∼(500–900)GeV with a wino-like lightest supersymmetric particle with mass in the range of ∼(170–210)GeV. The light gaugino spectra studied here is generally different from other models, and in particular those with a wino dominated LSP, in that here the gluinos can be significantly lighter. The positron excess reported by the PAMELA satellite data is accounted for by annihilations of the wino LSP and their relic abundance can generally be brought near the WMAP constraints due to the late decay of a modulus field re-populating the density of relic dark matter. We also mention the recent FERMI photon constraints on annihilating dark matter in this class of models and implications for direct detection experiments including CDMS and XENON. We study these signatures in models of supersymmetry with non-minimal soft breaking terms derived from both string compactifications and related supergravity models which generally lead to non-universal gaugino masses. At the LHC, large event rates from the three-body decays of the gluino in certain parts of the parameter space are found to give rise to early discovery prospects for the gaugino sector. Excess events at the 5 sigma level can arise with luminosity as low as O(100)pb−1 at a center of mass energy of 10 TeV and ≲O(1)fb−1 at s=7TeV.