SEMINARIO DI FISICA ASTROPARTICELLARE

Split Supersymmetry and Dark Matter

Stefano Profumo
(Florida State University)

Abstract
We study the phenomenology of neutralino dark matter within generic supersymmetric scenarios where the Gaugino and Higgsino masses are much lighter than the scalar soft breaking masses (Split Supersymmetry). We consider a low-energy model-independent approach and show that the guidelines in the definition of this general framework come from cosmology, which forces the lightest neutralino to have a mass smaller than 2.2 TeV. The testability of the framework is addressed by discussing all viable dark matter detection techniques. Current data on cosmic rays antimatter, gamma-rays and on the abundance of primordial 6Li already set significant constraints on the parameter space. Complementarity among future direct detection experiments, indirect searches for antimatter and with neutrino telescopes, and tests of the theory at future accelerators, such as the LHC and a NLC, is highlighted. Finally, we show how the analysis applies to a well-known instance of a Split-SUSY scenario, the focus point region of minimal supergravity.

Tuesday, 15 March 2005, at 15:00, Aula Wick


Carlo Giunti / giunti@to.infn.it
Last update: Tue 15 Mar 2005, 13:46:02 UTC