Mixed axion-wino dark matter

Frontiers in Physics

Lessa, Andre¹  Bae, Kyu Jung²  Baer, Howard Arthur²  Serce, Hasan² 

[1] Universidade de Sao Paulo, Instituto de Fısica, Sao Paulo, Brazil;University of Oklahoma, Physics and Astronomy, Norman, 73019, OK, United States

关键词: Axion;    WIMP;    dark matter;    supersymmetry;    wino;   

DOI  :  10.3389/fphy.2015.00049

学科分类：物理（综合）

来源: Frontiers

【 摘 要 】

A variety of supersymmetric models give rise to a split mass spectrum characterized by very heavy scalars but sub-TeV gauginos, usually with a wino-like LSP. Such models predict a thermally-produced underabundance of wino-like WIMP dark matter so that non-thermal DM production mechanisms are necessary. We examine the case where theories with a wino-like LSP are augmented by a Peccei-Quinn sector including an axion-axino-saxion supermultiplet in either the SUSY 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 are generated by solving the necessary coupled Boltzmann equations. We also present results for a model with radiatively-driven naturalness but with a wino-like LSP.

【 授权许可】

CC BY