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Abstract: This paper provides a comprehensive discussion of neutralino dark matterwithin classes of extended supersymmetric models referred to as the USSMcontaining one additional SM singlet Higgs plus an extra $Z-$, together withtheir superpartners the singlino and bino-. These extra states of the USSM cansignificantly modify the nature and properties of neutralino dark matterrelative to that of the minimal or even next-to-minimal supersymmetricstandard models. We derive the Feynman rules for the USSM and calculate thedark matter relic abundance and direct detection rates for elastic scatteringin the USSM for interesting regions of parameter space where the largestdifferences are expected.

Autor: J. Kalinowski, S.F. King, J.P. Roberts


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