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arXiv 1210.7619hep-ex
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寻找非标准模型希格斯玻色子玻色子衰变为一对新的四μ子末态轻玻色子

Search for a non-standard-model Higgs boson decaying to a pair of new light bosons in four-muon final states

CMS Collaboration

摘要:

结果报告从搜索非标准模型的希格斯玻色子玻色子衰变到新的轻玻色子对,其中每一个衰变到带相反电荷的双μ子的最终状态。新的玻色子可能会立即产生,也可能通过衰变链产生。该数据集对应于2011年LHC CMS实验记录的sqrt(s)= 7 TeV的质子-质子碰撞的积分亮度为5.3毫微微电子能的逆。这种希格斯玻色子衰变在新物理学的几种情况下都有预测,包括具有扩展希格斯扇区或隐藏谷的超对称模型。因此,研究结果对于确定在大型强子对撞机的希格斯玻色子研究中观察到的新粒子是否具有标准模型希格斯玻色子所期望的性质是相关的。相对于标准模型工艺的预期产率,未观察到过量事件。获得了截面乘以分支分数乘以接受度的乘积的模型独立上限为0.86 +/- 0.06 fb。的结果,这是适用于广泛的模型,与两个基准方案的预测相比,作为一个希格斯玻色子质量大于86 GeV和一个新的轻玻色子质量范围内的0.25-3.55 GeV的功能。

英文摘要:

Results are reported from a search for non-standard-model Higgs boson decays to pairs of new light bosons, each of which decays into the oppositely charged dimuon final state. The new bosons may be produced either promptly or via a decay chain. The data set corresponds to an integrated luminosity of 5.3 inverse femtobarns of proton-proton collisions at sqrt(s) = 7 TeV, recorded by the CMS experiment at the LHC in 2011. Such Higgs boson decays are predicted in several scenarios of new physics, including supersymmetric models with extended Higgs sectors or hidden valleys. Thus, the results of the search are relevant for establishing whether the new particle observed in Higgs boson searches at the LHC has the properties expected for a standard model Higgs boson. No excess of events is observed with respect to the yields expected from standard model processes. A model-independent upper limit of 0.86 +/- 0.06 fb on the product of the cross section times branching fraction times acceptance is obtained. The results, which are applicable to a broad spectrum of models, are compared with the predictions of two benchmark scenarios as functions of a Higgs boson mass larger than 86 GeV and of a new light boson mass within the range 0.25-3.55 GeV.

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