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arXiv 1111.2049hep-ph
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BMSSM希格斯玻色子在7 TeV LHC

BMSSM Higgs Bosons at the 7 TeV LHC

Marcela Carena, Eduardo Ponton, Jose Zurita

摘要:

我们认为希格斯部门的最小超对称标准模型的扩展,在超势和凯勒潜力的高维运营商,在希格斯搜索的背景下,在LHC 7 TeV运行。这种有效场论(EFT)方法,也称为BMSSM,允许模型独立的描述,可以对应于额外的超对称扇区的组合效应,例如重单线态,三线态或规范玻色子,其中超对称破缺质量分裂可以被视为微扰。我们认为目前的LHC数据集,基于约$1-2 {\rm fb}^{-1}$的数据设置排除限制的一大类BMSSM模型。我们还提出了5和15 fb $^{-1}$的综合光度的预测,假设ATLAS和CMS合作将结合他们的结果在每个通道。我们的研究表明,大多数参数空间将在$2σ$水平上探测15 fb $^{-1}$的数据。一个没有观测到的希格斯玻色子与大约10 fb $^{-1}$的数据将指向一个希格斯超对称谱与中间$\tan β$($\approx$几到10)和一个轻的SM样希格斯与底部和tau对的耦合有所增强。我们定义了一些BMSSM基准场景,并分析了可能的排除/发现渠道和预计所需的光度来探测它们。我们还讨论了两个具体模型的EFT框架的结果,一个是单重超场,一个是SU(2)$_L$三重态。

英文摘要:

We consider the Higgs sector in extensions of the Minimal Supersymmetric Standard Model by higher-dimension operators in the superpotential and the Kähler potential, in the context of Higgs searches at the LHC 7 TeV run. Such an effective field theory (EFT) approach, also referred to as BMSSM, allows for a model-independent description that may correspond to the combined effects of additional supersymmetric sectors, such as heavy singlets, triplets or gauge bosons, in which the supersymmetry breaking mass splittings can be treated as a perturbation. We consider the current LHC dataset, based on about $1-2 {\rm fb}^{-1}$ of data to set exclusion limits on a large class of BMSSM models. We also present projections for integrated luminosities of 5 and 15 fb$^{-1}$, assuming that the ATLAS and CMS collaborations will combine their results in each channel. Our study shows that the majority of the parameter space will be probed at the $2σ$ level with 15 fb$^{-1}$ of data. A non-observation of a Higgs boson with about 10 fb$^{-1}$ of data will point towards a Higgs SUSY spectrum with intermediate $\tan β$ ($\approx$ a few to 10) and a light SM-like Higgs with somewhat enhanced couplings to bottom and tau pairs. We define a number of BMSSM benchmark scenarios and analyze the possible exclusion/discovery channels and the projected required luminosity to probe them. We also discuss the results of the EFT framework for two specific models, one with a singlet superfield and one with SU(2)$_L$ triplets.

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