Neutralinos in the U(1)-extended SUSY: from colliders to cosmology

by Prof. Jan Kalinowski (Warsaw)

Thursday 6 Nov 2008, 14:00 → 15:00 Europe/Zurich

TH Theory Conference Room (CERN)

I will discuss the general structure of the neutralino sector in the USSM, an extension of the MSSM that involves a broken extra U(1) gauge symmetry. The decay modes of the new states and the impact of this extension on decays of the original MSSM neutralinos, including radiative transitions in cross-over zones, as well as production channels in cascade decays at the LHC and pair production at e+e- colliders will be discussed. These extra states of the USSM can also significantly modify the nature and properties of neutralino dark matter relative to that of the minimal (or even next-to-minimal) supersymmetric standard models. We calculate the dark matter relic abundance and direct detection rates for elastic scattering in the USSM for interesting regions of parameter space where the largest differences are expected.