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arXiv 0712.2965hep-phhep-ex
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超对称信号在ILC上的一般特征：求解LHC逆问题

General Features of Supersymmetric Signals at the ILC: Solving the LHC Inverse Problem

Carola F. Berger, James S. Gainer, JoAnne L. Hewett, Ben Lillie, Thomas G. Rizzo

备注：
102 pages, 75 figures; discussion added, typos fixed
发表信息：
Phys.Rev.D80:095018,2009
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摘要：

我们提出了第一个详细的，大规模的研究最小超对称标准模型（MSSM）在$\sqrt s=500$ GeV国际直线对撞机，包括完整的标准模型背景和探测器模拟。我们研究了MSSM参数空间中的242个点，我们称之为模型，Arkani-Hamed等人已经证明了这些点在LHC上很难研究。事实上，MSSM参数空间中的这些点对应于162对模型，这些模型在LHC上给出了无法区分的签名，从而产生了所谓的LHC逆问题。我们首先确定是否生产的各种超对称粒子是可见的以上的标准模型的背景下，这些参数空间点，然后作出详细的比较，他们的各种签名。假设积分亮度为500 fb $^{-1}$，我们发现242个模型中只有82个导致具有显著性$\geq 5$的某种可见特征，并且162个模型对中只有57（63）个在$5(3)σ$处是可区分的。我们的分析包括PYTHIA和CompHEP超对称信号生成，所有$2\to 2, 2\to 4$的全矩阵元素SM背景，以及$2\to 6$过程，ISR和通过WHIZARD/GuineaPig生成的波束辐射，并采用快速SiD探测器模拟org. lcsim。

英文摘要：

We present the first detailed, large-scale study of the Minimal Supersymmetric Standard Model (MSSM) at a $\sqrt s=500$ GeV International Linear Collider, including full Standard Model backgrounds and detector simulation. We investigate 242 points in the MSSM parameter space, which we term models, that have been shown by Arkani-Hamed et al to be difficult to study at the LHC. In fact, these points in MSSM parameter space correspond to 162 pairs of models which give indistinguishable signatures at the LHC, giving rise to the so-called LHC Inverse Problem. We first determine whether the production of the various SUSY particles is visible above the Standard Model background for each of these parameter space points, and then make a detailed comparison of their various signatures. Assuming an integrated luminosity of 500 fb$^{-1}$, we find that only 82 out of 242 models lead to visible signatures of some kind with a significance $\geq 5$ and that only 57(63) out of the 162 model pairs are distinguishable at $5(3)σ$. Our analysis includes PYTHIA and CompHEP SUSY signal generation, full matrix element SM backgrounds for all $2\to 2, 2\to 4$, and $2\to 6$ processes, ISR and beamstrahlung generated via WHIZARD/GuineaPig, and employs the fast SiD detector simulation org.lcsim.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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