English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In anomaly-mediated supersymmetry breaking, superpartners in a hidden sectorhave masses that are proportional to couplings squared, and so naturally freezeout with the desired dark matter relic density for a large range of masses. Wepresent an extremely simple realization of this possibility, with WIMPless darkmatter arising from a hidden sector that is supersymmetric QED with N_Fflavors. Dark matter is multi-component, composed of hidden leptons andsleptons with masses anywhere from 10 GeV to 10 TeV, and hidden photons providethe thermal bath. The dark matter self-interacts through hidden sector Coulombscatterings that are potentially observable. In addition, the hidden photoncontribution to the number of relativistic degrees of freedom is in the range\Delta N_eff ~ 0 - 2, and, if the hidden and visible sectors were initially inthermal contact, the model predicts \Delta N_eff ~ 0.2 - 0.4. Data alreadytaken by Planck may provide evidence of such deviations.

WIMPless Dark Matter in Anomaly-Mediated Supersymmetry Breaking with Hidden QED