Improved discovery of a nearly degenerate model: MUED using MT2 at the LHC
Improved discovery of a nearly degenerate model: MUED using MT2 at the LHC
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改进了近乎退化模型的发现：在 LHC 上使用 MT2 进行 MUED
DOI：
10.1103/physrevd.84.094015
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
H. Murayama Mihoko M. Nojiri and K. Tobioka
中科院分区：
文献类型：
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作者：
Ken-ichi Oohara;Jordan B. Camp;Yuta Hiranuma;Alexander Stroeer;Hirotaka Takahashi;Y. Koike and S. Yoshida;Kazuhiro Sakai;H. Murayama Mihoko M. Nojiri and K. Tobioka
我们研究了最小普适额外维模型（MUED）的发现潜力，并利用LHC上的模型对其进行了改进。由于MUED具有近简并谱，因此大多数事件只有软喷流和小喷流。这个特征很难搜索我们申请事件选择，并将不可见粒子质量（测试质量）设置为零。测试质量比MUED的不可见粒子质量小得多。在这种情况下，取决于包括初始状态辐射的上游辐射，信号可以是大的。另一方面，背景的主要是低于顶夸克质量。因此，从高区域中的背景中提取信号。由于我们使用了领先的射流，因此存在组合效应。我们发现，这种效果也提高了高信噪比。我们对QCD辐射进行了矩阵元修正的详细模拟。这种切割提高了MUED的发现潜力，并且对于我们考虑的最简并参数，这种提高尤其显著。
We study the discovery potential of the minimal universal extra dimension model (MUED) and improve it by utilizing themode at the LHC. Since the MUED has a nearly degenerate spectrum, most events only have soft jets and small. The signature is challenging to search. We applyfor the event selection and set the invisible particle mass of(test mass) to zero. The test mass is much smaller than the invisible particle mass of MUED. In that case,of the signal can be large depending on up-stream radiation which includes initial state radiation. On the other hand,of the background is mainly below the top quark mass. Hence, the signal is extracted from the background in the highregion. Since we use the leading jets for, there is a combinatorics effect. We find that the effect also enhances the signal to background ratio for high. We perform a detailed simulation with the matrix element correction to the QCD radiations. The discovery potential of the MUED is improved by thecut, and the improvement is especially significant for the most degenerate parameter we consider,.