A New Measure of Fine Tuning

Abstract

The solution to fine tuning is one of the principal motivations for Beyond the Standard Model (BSM) Studies. However constraints on new physics indicate that many of these BSM models are also fine tuned (although to a much lesser extent). To compare these BSM models it is essential that we have a reliable, quantitative measure of tuning. We review the measures of tuning used in the literature and propose an alternative measure. We apply this measure to several toy models and the Minimal Supersymmetric Standard Model.

25 pages, some colour figures; version accepted for publication

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• A Natural SUSY Higgs Near 125 GeV
• NMSSM Higgs Benchmarks Near 125 GeV
• Natural NMSSM Higgs Bosons
• SUSY models under siege: LHC constraints and electroweak fine-tuning
• Bayesian approach and Naturalness in MSSM analyses for the LHC
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