2012/10/29 by Howard Baer · 1 citation
Physics and Astronomy · #Astrophysics #Axion #Biology #Context (archaeology) #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Electroweak interaction #Electroweak scale #Higgs boson #Higgsino #Large Hadron Collider #Light dark matter #Minimal Supersymmetric Standard Model #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Scalar field dark matter #Supersymmetry #Supersymmetry breaking #astro-ph.CO #hep-ph
paper · pdf · doi:10.1063/1.4807341
14 pages plus 2 figures; transcript of talk given at Center for Theoretical Underground Physics (CETUP) workshop, July 12, 2012, Lead, South Dakota
arxiv created 2012/10/29 · openalex publication_date 2013/01/01 · arxiv updated 2015/06/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Models of natural supersymmetry seek to solve the little hierarchy problem by positing a spectrum of light higgsinos \lesssim 200 GeV and light top squarks \lesssim 500 GeV along with very heavy squarks and TeV-scale gluinos. Such models have low electroweak finetuning and are safe from LHC searches. However, in the context of the MSSM, they predict too low a value of m(h) and the relic density of thermally produced higgsino-like WIMPs falls well below dark matter (DM) measurements. Allowing for high scale soft SUSY breaking Higgs mass mHu> m0 leads to natural cancellations during RG running, and to radiatively induced low finetuning at the electroweak scale. This model of radiative natural SUSY (RNS), with large mixing in the top squark sector, allows for finetuning at the 5-10% level with TeV-scale top squarks and a 125 GeV light Higgs scalar h. If the strong CP problem is solved via the PQ mechanism, then we expect an axion-higgsino admixture of dark matter, where either or both the DM particles might be directly detected.