Frontiers in Physics (Jul 2015)

Mixed axion-wino dark matter

  • Kyu Jung Bae,
  • Howard Arthur Baer,
  • Andre eLessa,
  • Hasan eSerce

DOI
https://doi.org/10.3389/fphy.2015.00049
Journal volume & issue
Vol. 3

Abstract

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A variety of supersymmetric models give rise to a split mass spectrumcharacterized by very heavy scalars but sub-TeV gauginos, usually with awino-like LSP. Such models predict a thermally-produced underabundance ofwino-like WIMP dark matter so that non-thermal DM production mechanisms arenecessary.We examine the case where theories with a wino-like LSP are augmented by aPeccei-Quinn sector including an axion-axino-saxion supermultiplet in either theSUSY KSVZ or SUSY DFSZ models and with/without saxion decays to axions/axinos.We show allowed ranges of PQ breaking scale f_a for various cases which aregenerated by solving the necessary coupled Boltzmann equations.We also present results for a model with radiatively-driven naturalnessbut with a wino-like LSP.

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