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The fine-tuning price of LEP
We quantify the amount of fine tuning of input parameters of the Minimal Supersymmetric Extension of the Standard Model (MSSM) that is needed to respect the lower limits on sparticle and Higgs masses imposed by precision electroweak measurements at LEP, measurements of $b\to X_s\gamma$, and searches...
| Autores principales: | , , |
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| Lenguaje: | eng |
| Publicado: |
1997
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/S0370-2693(98)00060-4 http://cds.cern.ch/record/339939 |
| _version_ | 1780891457957134336 |
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| author | Chankowski, Piotr H. Ellis, John R. Pokorski, Stefan |
| author_facet | Chankowski, Piotr H. Ellis, John R. Pokorski, Stefan |
| author_sort | Chankowski, Piotr H. |
| collection | CERN |
| description | We quantify the amount of fine tuning of input parameters of the Minimal Supersymmetric Extension of the Standard Model (MSSM) that is needed to respect the lower limits on sparticle and Higgs masses imposed by precision electroweak measurements at LEP, measurements of $b\to X_s\gamma$, and searches at LEP 2. If universal input scalar masses are assumed in a gravity-mediated scenario, a factor of $\gappeq180$ is required at $\tan\beta\sim1.65$, decreasing to if non-universal input scalar Higgs masses are allowed, but may be significantly reduced if some theoretical relations between MSSM parameters are assumed. |
| id | cern-339939 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 1997 |
| record_format | invenio |
| spelling | cern-3399392023-03-14T18:55:01Zdoi:10.1016/S0370-2693(98)00060-4http://cds.cern.ch/record/339939engChankowski, Piotr H.Ellis, John R.Pokorski, StefanThe fine-tuning price of LEPParticle Physics - PhenomenologyWe quantify the amount of fine tuning of input parameters of the Minimal Supersymmetric Extension of the Standard Model (MSSM) that is needed to respect the lower limits on sparticle and Higgs masses imposed by precision electroweak measurements at LEP, measurements of $b\to X_s\gamma$, and searches at LEP 2. If universal input scalar masses are assumed in a gravity-mediated scenario, a factor of $\gappeq180$ is required at $\tan\beta\sim1.65$, decreasing to if non-universal input scalar Higgs masses are allowed, but may be significantly reduced if some theoretical relations between MSSM parameters are assumed.We quantify the amount of fine tuning of input parameters of the Minimal Supersymmetric Extension of the Standard Model (MSSM) that is needed to respect the lower limits on sparticle and Higgs masses imposed by precision electroweak measurements at LEP, measurements of $b\to X_s\gamma$, and searches at LEP 2. If universal input scalar masses are assumed in a gravity-mediated scenario, a factor of $\gappeq180$ is required at $\tan\beta\sim1.65$, decreasing to $\sim20$ at $\tan\beta\sim10$. The amount of fine tuning is not greatly reduced if non-universal input scalar Higgs masses are allowed, but may be significantly reduced if some theoretical relations between MSSM parameters are assumed.We quantify the amount of fine tuning of input parameters of the Minimal Supersymmetric Extension of the Standard Model (MSSM) that is needed to respect the lower limits on sparticle and Higgs masses imposed by precision electroweak measurements at LEP, measurements of b → X s γ , and searches at LEP 2. If universal input scalar masses are assumed in a gravity-mediated scenario, a factor of ≳180 is required at tan β ∼1.65, decreasing to ∼20 at tan β ∼10. The amount of fine tuning is not greatly reduced if non-universal input scalar Higgs masses are allowed, but may be significantly reduced if some theoretical relations between MSSM parameters are assumed.hep-ph/9712234CERN-TH-97-343IFT-97-19CERN-TH-97-343IFT-97-19oai:cds.cern.ch:3399391997-12-03 |
| spellingShingle | Particle Physics - Phenomenology Chankowski, Piotr H. Ellis, John R. Pokorski, Stefan The fine-tuning price of LEP |
| title | The fine-tuning price of LEP |
| title_full | The fine-tuning price of LEP |
| title_fullStr | The fine-tuning price of LEP |
| title_full_unstemmed | The fine-tuning price of LEP |
| title_short | The fine-tuning price of LEP |
| title_sort | fine-tuning price of lep |
| topic | Particle Physics - Phenomenology |
| url | https://dx.doi.org/10.1016/S0370-2693(98)00060-4 http://cds.cern.ch/record/339939 |
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