2001/01/02 by R. Arnowitt, Arnowitt, R., B. Dutta +4
Computer Science · Physics and Astronomy · #Astrophysics (astro-ph) #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #astro-ph #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0101020
17 pages, latex, 12 figures, talk given at International Workshop on Particle Physics and the Early Universe (COSMO-2000), Cheju Island, Korea, 4-8 September, 2000
arxiv created 2001/01/02 · openalex publication_date 2001/01/02 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider the neutralino proton cross section for detection of Milky Way dark matter for a number of supergravity models with gauge unification at the GUT scale: models with universal soft breaking (mSUGRA), models with nonuniversal soft breaking, and string inspired D-brane models. The parameter space examined includes m1/2<1 TeV and tan β< 50, and the recent Higgs bound of mh >114 GeV is imposed. (For grand unified models, this bound is to be imposed for all tan β.) All coannihilation effects are included as well as the recent NLO corrections to b→ sγfor large tan β, and coannihilation effects are shown to be sensitive to A0 for large tan β. In all models, current detectors are sampling parts of the paramater space i. e. tan β>~ 25 for mSUGRA, tan β>~ 7 for nonuniversal models, and tan β>~ 20 for D-brane models. Future detectors should be able to cover almost the full parameter space for μ> 0. For μ< 0, cancellations can occur for m1/2 >~ 450 GeV, allowing the cross sections to become ~< 10-10 pb for limited ranges of tanβ. (The positions of these cancellations are seen to be sensitive to the value of σπN.) In this case, the gluino and squarks lie above 1 TeV, but still should be accessible to the LHC if m1/2 <1 TeV.