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arXiv 1608.00890hep-ex
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用ATLAS探测器搜索在$\sqrt{s}=13$ TeV的PDMATHAAD碰撞中产生的最小超对称标准模型希格斯玻色子$H/A$和$Z^{\prime}$玻色子

Search for Minimal Supersymmetric Standard Model Higgs bosons $H/A$ and for a $Z^{\prime}$ boson in the $ττ$ final state produced in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS Detector

ATLAS Collaboration

摘要:

搜索中性希格斯玻色子的最小超对称标准模型(MSSM)和重中性$Z^{\prime}$玻色子进行使用的数据样本对应于3.2 FB $^{-1}$从质子-质子碰撞在$\sqrt{s} = 13$ TeV的ATLAS探测器记录在大型强子对撞机。假设重共振衰变为$τ^+ τ^-$对,其中至少有一个$τ$轻子衰变为强子和中微子的末态。对MSSM中性希格斯玻色子玻色子和重中性$Z^{\prime}$玻色子分别在0.2- 1.2TeV和0.5- 2.5TeV的质量范围内进行了搜索。的数据是在良好的协议与背景预测的标准模型,因此结果给出的生产横截面上的上限倍的玻色子衰变到$τ^+τ^-$的分支分数作为玻色子质量的函数。在MSSM和$Z^{\prime}$基准场景中解释了结果。最严格的MSSM参数空间的希格斯玻色子搜索的限制排除在95%的置信水平(CL)$m_{h}^{\textrm{mod+}}$ MSSM的情况下$m_A = 200$ GeV的$\tanβ> 7.6$。这一分析扩展了MSSM的限制,从以前的搜索的质量范围$m_A > 500$ GeV。对于顺序标准模型,在95%CL下排除了高达1.90 TeV的$Z^{\prime}_\mathrm{SSM}$质量,对于强风味模型的$Z^{\prime}_{\mathrm{SFM}}$排除了高达1.82- 2.17 TeV的质量。

英文摘要:

A search for neutral Higgs bosons of the Minimal Supersymmetric Standard Model (MSSM) and for a heavy neutral $Z^{\prime}$ boson is performed using a data sample corresponding to an integrated luminosity of 3.2 fb$^{-1}$ from proton--proton collisions at $\sqrt{s} = 13$ TeV recorded by the ATLAS detector at the LHC. The heavy resonance is assumed to decay to a $τ^+ τ^-$ pair with at least one $τ$ lepton decaying to final states with hadrons and a neutrino. The search is performed in the mass range of 0.2--1.2 TeV for the MSSM neutral Higgs bosons and 0.5--2.5 TeV for the heavy neutral $Z^{\prime}$ boson. The data are in good agreement with the background predicted by the Standard Model and hence results are given as upper limits on the production cross section times branching fraction of the boson decay to $τ^+τ^-$ as a function of the boson mass. The results are interpreted in MSSM and $Z^{\prime}$ benchmark scenarios. The most stringent MSSM parameter space constraints for the Higgs boson search exclude at 95\% confidence level (CL) $\tanβ> 7.6$ for $m_A = 200$ GeV in the $m_{h}^{\textrm{mod+}}$ MSSM scenario. This analysis extends the MSSM limits from previous searches for the mass range $m_A > 500$ GeV. For the Sequential Standard Model, a $Z^{\prime}_\mathrm{SSM}$ mass up to 1.90 TeV is excluded at 95% CL and masses up to 1.82--2.17 TeV are excluded for a $Z^{\prime}_{\mathrm{SFM}}$ of the Strong Flavour Model.

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