The NMSSM Solution to the Fine-Tuning Problem, Precision Electroweak Constraints and the Largest LEP Higgs Event Excess

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dc.creatorDermisek, Radovan
dc.creatorGunion, John F.
dc.date2007-05-30
dc.date2007-09-19
dc.date.accessioned2026-07-07T10:55:56Z
dc.date.available2026-07-07T10:55:56Z
dc.descriptionWe present an extended study of how the Next to Minimal Supersymmetric Model easily avoids fine-tuning in electroweak symmetry breaking for a SM-like light Higgs with mass in the vicinity of $100\gev$, as beautifully consistent with precision electroweak data, while escaping LEP constraints due to the dominance of $h\to aa$ decays with $m_a<2m_b$ so that $a\to \tauptaum$ or jets. The residual $\sim 10%$ branching ratio for $h\to b\anti b$ explains perfectly the well-known LEP excess at $\mh\sim 100\gev$. Details of model parameter correlations and requirements are discussed as a function $\tan(β)$. Comparisons of fine-tuning in the NMSSM to that in the MSSM are presented. We also discuss fine-tuning associated with scenarios in which the $a$ is essentially pure singlet, has mass $m_a>30\gev$, and decays primarily to $\gam\gam$ leading to an $h\to aa\to 4\gam$ Higgs signal.
dc.description26 pages, 37 figures, published version with minor text and reference improvements
dc.identifierhttps://arxiv.org/abs/0705.4387
dc.identifierhttp://arxiv.org/abs/0705.4387
dc.identifierPhys.Rev.D76:095006,2007
dc.identifierdoi:10.1103/PhysRevD.76.095006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/186245
dc.subjectHigh Energy Physics - Phenomenology
dc.titleThe NMSSM Solution to the Fine-Tuning Problem, Precision Electroweak Constraints and the Largest LEP Higgs Event Excess
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