2000/10/20 by R. Arnowitt, B. Dutta, Arnowitt, R. +3
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #astro-ph #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0010244
16 pages, latex, 13 figures, talk at DARK 2000, Heidelberg, Germany, July 10-15, 2000
arxiv created 2000/10/20 · arxiv updated 2009/11/30
We consider neutralino-proton cross sections for halo dark matter neutralinos within the framework of supergravity models with R-parity invariance for models with universal soft breaking (mSUGRA) and models with nonuniversal soft breaking. The analysis includes the necessary corrections to treat the large tanbeta region (i.e. L-R mixing in the squark and slepton mass matrices, loop corrections to the b and tau masses,etc) and includes all coannihilation phenomena. For mSUGRA, dark matter detectors with current sensitivity are seen to be probing the region where tanbeta>~25, Omega h2 <0.1, mchi10~<90 GeV, and for the light Higgs, mh~< 120 GeV. Nonuniversal models can have a much larger cross section, and current detectors can probe part of the parameter space where tan>~4. Minimum cross sections are generally greater than 10-9 pb to 10-10 pb for m1/2 <600 GeV (and hence accessible to planned future detectors), with the exception of a region when mu <0 where for m1/2>~450 GeV, 4~< tanbeta~<20, the cross section drops to a minimum of about 1×10-12 pb at m1/2=600 GeV, tan beta=~10. In this region, the gluino and squarks lie above 1 TeV, but should still be accessible to the LHC.