August 28, 2011 to September 2, 2011
US/Central timezone
Slides available on Indico -- there are no formal proceedings

WIMPless Dark Matter in Anomaly-Mediation with Hidden QED

Sep 1, 2011, 3:50 PM
D: Wilson Hall 1 North

D: Wilson Hall 1 North


Dr Vikram Rentala (U. Arizona/UC Irvine)


In anomaly-mediated supersymmetry breaking, superpartners in a hidden sector have masses that are proportional to couplings squared, and so naturally freeze out with the desired dark matter relic density for a large range of masses. We present an extremely simple realization of this possibility, with WIMPless dark matter arising from a hidden sector that is supersymmetric QED with $N_F$ flavors. Dark matter is multi-component, composed of hidden leptons and sleptons with masses anywhere from 10 GeV to 10 TeV, and hidden photons provide the thermal bath. The dark matter self-interacts through hidden sector Coulomb scatterings that are potentially observable. In addition, the hidden photon contribution to the number of relativistic degrees of freedom is in the range $\Delta \neff \sim 0 - 2$, and, if the hidden and visible sectors were initially in thermal contact, the model predicts $\Delta \neff \sim 0.2 - 0.4$. Data already taken by Planck may provide evidence of such deviations.

Presentation materials