Naturalness and GUT scale Yukawa coupling ratios in the constrained MSSM
| Autor: | Lorenzo Calibbi, Stefan Antusch, Martin Spinrath, Vinzenz Maurer, Maurizio Monaco |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics 010308 nuclear & particles physics High Energy Physics::Phenomenology Yukawa potential Sigma Scale (descriptive set theory) Supersymmetry Coupling (probability) 01 natural sciences 0103 physical sciences Grand Unified Theory 010306 general physics Minimal Supersymmetric Standard Model |
| Zdroj: | Physical Review D. 85 |
| ISSN: | 1550-2368 1550-7998 |
| DOI: | 10.1103/physrevd.85.035025 |
| Popis: | We analyze the fine-tuning in the constrained minimal supersymmetric standard model in the light of the present and expected ATLAS and CMS searches for supersymmetry. Even with $10\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of data and no discovery of supersymmetry valid regions might remain with fine-tuning less than 20. Moreover we investigate the fine-tuning price of grand unification scale Yukawa coupling relations. Considering a $2\ensuremath{\sigma}$ constraint for $(g\ensuremath{-}2{)}_{\ensuremath{\mu}}$ and fine-tuning less than 30 yields an allowed range of ${y}_{\ensuremath{\tau}}/{y}_{b}=[1.31,1.70]$, which points towards the alternative grand unification prediction ${y}_{\ensuremath{\tau}}/{y}_{b}=3/2$. Relaxing the $(g\ensuremath{-}2{)}_{\ensuremath{\mu}}$ constraint to $5\ensuremath{\sigma}$ extends the possible region to [1.02, 1.70], allowing for approximate $b\ensuremath{-}\ensuremath{\tau}$ Yukawa coupling unification. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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