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Dark Matter in Supergravity

  • R. Arnowitt
  • B. Dutta
  • Y. Santoso
Conference paper

Abstract

We consider neutralino-proton cross sections for halo dark matter neutralinos \( \left( {\tilde{\chi }_{1}^{0}} \right) \) 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 tanβ region (i.e. L-R mixing in the squark and slepton mass matrices, loop corrections to the b and τ masses,etc) and includes all coannihilation phenomena. For mSUGRA, dark matter detectors with current sensitivity are seen to be probing the region where tanβ ≳25, \( {{\Omega }_{{\tilde{\chi }_{1}^{0}}}}{{h}^{2}} < 0.1,{{m}_{{\tilde{\chi }_{1}^{0}}}} \lesssim 90GeV \), and for the light Higgs, m h ≲ 120 GeV. Nonuniversal models can have a much larger cross section, and current detectors can probe part of the parameter space where tanß ≳ 4. Minimum cross sections are generally greater than 10–9 pb to 10–10 pb for m 1/2 = 600 GeV, (and hence accessible to planned future detectors), with the exception of a region when µ < 0 where for m 1/2 ≳ 450 GeV, 4 ≲ tanβ ≲ 20, the cross section drops to a minimum of about 1 × 10–12 pb at m 1/2 = 600 GeV, tanβ ⋍ 10. In this region, the gluino and squarks lie above 1 TeV, but should still be accessible to the LHC.

Keywords

Dark Matter Higgs Mass Annihilation Cross Section Halo Dark Matter Current Detector 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • R. Arnowitt
    • 1
  • B. Dutta
    • 1
  • Y. Santoso
    • 1
  1. 1.Department of Physics, Center for Theoretical PhysicsTexas A&M UniversityCollege StationUSA

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