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

We examine mixed axion/neutralino cold dark matter production in the SUSYDFSZ axion model where an axion superfield couples to Higgs superfields. Wecalculate a wide array of axino and saxion decay modes along with their decaytemperatures, and thermal and non-thermal production rates. For a SUSYbenchmark model with a standard underabundance (SUA) of Higgsino-like darkmatter (DM), we find for the PQ scale f_a< 10^{12} GeV that the DM abundance ismainly comprised of axions as the saxion/axino decay occurs before the standardneutralino freeze-out and thus its abundance remains suppressed. For 10^{12}<~f_a<~ 10^{14} GeV, the saxion/axino decays occur after neutralino freeze-out sothat the neutralino abundance is enhanced by the production via decay andsubsequent re-annihilation. For f_a>~ 10^{14} GeV, both neutralino dark matterand dark radiation are typically overproduced. For judicious parameter choices,these can be suppressed and the combined neutralino/axion abundance broughtinto accord with measured values. A SUSY benchmark model with a standardoverabundance (SOA) of bino DM is also examined and typically remains excludeddue at least to too great a neutralino DM abundance for f_a<~ 10^{15} GeV. Forf_a>~ 10^{15} GeV and lower saxion masses, large entropy production from saxiondecay can dilute all relics and the SOA model can be allowed by allconstraints.

Mixed axion/neutralino dark matter in the SUSY DFSZ axion model