2000/01/03 by Elena Accomando, E. Accomando, R. Arnowitt +3 · 2 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #astro-ph #hep-ph
paper · pdf · doi:10.1016/s0550-3213(00)00321-7
published as Nucl.Phys.B585:124-142,2000 · 22 pages, latex, 18 figures
arxiv created 2000/01/03 · openalex publication_date 2000/10/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The neutralino-proton cross section is examined for supergravity models with R-parity invariance with universal and non-universal soft breaking. The region of parameter space that dark matter detectors are currently (or will be shortly) sensitive i.e. (0.1-10)× 10-6 pb, is examined. For universal soft breaking (mSUGRA), detectors with sensitivity σ_χ10-p ≥ 1 × 10-6 pb will be able to sample parts of the parameter space for tan β\stackrel>∼ 25. Current relic density bounds restrict m_χ10 ≤ 120 GeV for the maximum cross sections, which is below where astronomical uncertainties about the Milky Way are relevant. Nonuniversal soft breaking models can allow much larger cross sections and can sample the parameter space for tan β\stackrel>∼ 4. In such models, m0 can be quite large reducing the tension between proton decay bounds and dark matter analysis. We note the existance of two new domains where coannihilation effects can enter, i.e. for mSUGRA at large tan β, and for nonuniversal models with small tan β.