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WIMPless dark matter in anomaly-mediated supersymmetry breaking with hidden QED

WIMPless dark matter in anomaly-mediated supersymmetry breaking with hidden QED 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 multicomponent, 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 Δ N eff ∼ 0 – 2 , and, if the hidden and visible sectors were initially in thermal contact, the model predicts Δ N eff ∼ 0.2 – 0.4 . Data already taken by Planck may provide evidence of such deviations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review D American Physical Society (APS)

WIMPless dark matter in anomaly-mediated supersymmetry breaking with hidden QED

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References (44)

Publisher
American Physical Society (APS)
Copyright
Copyright © 2011 The American Physical Society
ISSN
1550-2368
DOI
10.1103/PhysRevD.84.095033
Publisher site
See Article on Publisher Site

Abstract

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 multicomponent, 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 Δ N eff ∼ 0 – 2 , and, if the hidden and visible sectors were initially in thermal contact, the model predicts Δ N eff ∼ 0.2 – 0.4 . Data already taken by Planck may provide evidence of such deviations.

Journal

Physical Review DAmerican Physical Society (APS)

Published: Nov 1, 2011

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