Comparing the Predictions of two Mixed Neutralino Dark Matter Models with the Recent CDMS II Candidate Events

TL;DR

This paper compares two mixed neutralino dark matter models' predictions for direct detection signals with recent CDMS II candidate events, highlighting where models align with potential signals.

Contribution

It introduces two nonuniversal gaugino mass models that fit WMAP relic density and compares their direct detection predictions with recent experimental data.

Findings

One model's prediction matches some candidate events.

The other model's prediction aligns with all WMAP-compatible parameters.

Both models provide viable explanations for the CDMS II signals.

Abstract

We consider two optimally mixed neutralino dark matter models, based on nonuniversal gaugino masses, which were recently proposed by us to achieve WMAP compatible relic density over a large part of the MSSM parameter space. We compare the resulting predictions for the spin-independent DM scattering cross-section with the recent CDMS II data, assuming the possibility of the two reported candidate events being signal events. For one model the predicted cross-section agrees with the putative signal over a small part of the parameter space, while for the other the agreement holds over the entire WMAP compatible parameter space of the model.