Naturalness, supersymmetry and dark matter

Peter Athron, Csaba Balazs, Ben Farmer, Doyoun Kim

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch


We present the Bayesian naturalness prior to quantify electroweak fine tuning in the Next-to-Minimal Supersymmetric Standard Model (NMSSM). The naturalness prior arises automatically as an Occam razor in Bayesian model comparison quantifying the plausibility of electroweak symmetry breaking within the model. The prior incorporates the most widely used fine tuning measures as special cases. In particular, it captures features the Barbieri-Ellis-Giudice, and the Electroweak Fine Tuning measures. We present the amount of Bayesian fine tuning over parameter space slices of the Constrained MSSM, the Constrained NMSSM, and an 11 parameter NMSSM scenario. According to the naturalness prior the constrained models are less tuned than other fine-tuning measures indicate.
Original languageEnglish
Title of host publication11th International Workshop Dark Side of the Universe 2015
Place of PublicationItaly
PublisherProceedings of Science
Number of pages8
Publication statusPublished - 2015
EventInternational Workshop on the Dark Side of The Universe (DSU) 2015 - Kyoto University, Kyoto, Japan
Duration: 14 Dec 201518 Dec 2015
Conference number: 11th


WorkshopInternational Workshop on the Dark Side of The Universe (DSU) 2015
Abbreviated titleDSU 2015
Internet address

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