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arXiv 1301.3633hep-phhep-ex
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LHC数据两年后的约束超对称性:Fittino的全局拟合

Constrained Supersymmetry after two years of LHC data: global fits with Fittino

Xavier Prudent

摘要:

我们进行全球拟合的约束最小超对称标准模型(CMSSM)的参数和非通用希格斯质量(NUHM 1)的变体。除了来自低能量精确观测和宇宙学暗物质密度的约束外,我们还考虑了LHC排除在喷流搜索之外,加上在sqrt(s)= 7 TeV处约5/fb的积分亮度的缺失横向能量签名。我们还包括最近的上限上的分支比Bs->mumu从LHCb。CMSSM的最佳拟合倾向于一个轻的希格斯玻色子玻色子,其质量刚好高于实验排除的质量。我们发现,低能观测量的描述,特别是(g-2)(μ),在LHC的超对称性的非观测变得越来越不兼容的CMSSM。一个潜在的类似SM的希格斯玻色子,质量约为126 GeV,几乎不能被容纳。BF(Bs->mumu)的值恰好在标准模型预测值附近,这自然是最佳拟合区域中的预期值。

英文摘要:

We perform global fits to the parameters of the Constrained Minimal Supersymmetric Standard Model (CMSSM) and to a variant with non-universal Higgs masses (NUHM1). In addition to constraints from low-energy precision observables and the cosmological dark matter density, we take into account the LHC exclusions from searches in jets plus missing transverse energy signatures with about 5/fb of integrated luminosity at sqrt(s)=7TeV. We also include the most recent upper bound on the branching ratio Bs->mumu from LHCb. The best fit of the CMSSM prefers a light Higgs boson just above the experimentally excluded mass. We find that the description of the low-energy observables, (g-2)(mu) in particular, and the non-observation of SUSY at the LHC become more and more incompatible within the CMSSM. A potential SM-like Higgs boson with mass around 126 GeV can barely be accommodated. Values for BF(Bs->mumu) just around the Standard Model prediction are naturally expected in the best fit region.

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