2006/09/30 by A. Provenza, Alessio Provenza, M. Quirós +3 · 1 citation
Physics and Astronomy · #Astrophysics #CMB cold spot #Chargino #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Gaugino #Higgsino #Lepton #Minimal Supersymmetric Standard Model #Missing energy #Neutralino #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum mechanics #Scalar field dark matter #Superpartner #Supersymmetry #Supersymmetry breaking #astro-ph #hep-ph
paper · pdf · doi:10.1088/1475-7516/2006/12/007
published as JCAP0612:007,2006 · 14 pages, references added, typos corrected, matches with the published version
openalex publication_date 2006/12/06 · arxiv created 2006/12/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider the split extended ( N = 2) supersymmetry scenario recently proposed by Antoniadis et al [ hep-ph/0507192 ] as a realistic low energy framework arising from intersecting brane models. While all scalar superpartners and charged gauginos are naturally at a heavy scale, the model low energy spectrum contains a Higgsino-like chargino and a neutralino sector made out of two Higgsino and two Bino states. We show that the lightest neutralino is a viable dark matter candidate, finding regions in the parameter space where its thermal relic abundance matches the latest determination of the density of matter in the Universe by WMAP. We also discuss dark matter detection strategies within this model: we point out that current data on cosmic-ray antimatter already place significant constraints on the model, while direct detection is the most promising technique for the future. Analogies and differences with respect to the standard split SUSY scenario based on the Minimal Supersymmetric Standard Model are illustrated.