2003/10/31 by J.A Casas, J. A. Casas, J. R. Espinosa +3 · 3 citations
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Electroweak interaction #Electroweak scale #Fine-tuning #Higgs boson #Minimal Supersymmetric Standard Model #Neutrino Physics Research #Particle physics theoretical and experimental studies #Physics beyond the Standard Model #Supersymmetry #Supersymmetry breaking #hep-ph
paper · pdf · doi:10.1088/1126-6708/2004/01/008
published as JHEP 0401:008,2004 · 28 pages, 9 PS figures, LaTeX Published version
openalex publication_date 2004/01/09 · arxiv created 2004/01/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
As is well known, electroweak breaking in the MSSM requires substantial fine-tuning, mainly due to the smallness of the tree-level Higgs quartic coupling, lambdatree. Hence the fine tuning is efficiently reduced in supersymmetric models with larger lambdatree, as happens naturally when the breaking of SUSY occurs at a low scale (not far from the TeV). We show, in general and with specific examples, that a dramatic improvement of the fine tuning (so that there is virtually no fine-tuning) is indeed a very common feature of these scenarios for wide ranges of tan(beta) and the Higgs mass (which can be as large as several hundred GeV if desired, but this is not necessary). The supersymmetric flavour problems are also drastically improved due to the absence of RG cross-talk between soft mass parameters.