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arXiv 1809.04517hep-phhep-ex
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利用一个被遗忘的运动学变量增强类超对称衰变的发现前景

Enhancing the discovery prospects for SUSY-like decays with a forgotten kinematic variable

Dipsikha Debnath, James S. Gainer, Can Kilic, Doojin Kim, Konstantin T. Matchev, Yuan-Pao Yang

摘要:

大型强子对撞机迄今为止缺乏新的物理信号,这促使我们考虑如何寻找具有挑战性的最终状态,具有大的标准模型背景和微妙的运动学特征,如压缩光谱的级联衰变。采用一个基准的超对称性的衰变拓扑结构与四体的最终状态进行通过一系列的两体衰变通过中间共振,我们把注意力集中在运动学变量$Δ_{4}$,以前已被用来参数化的边界允许四体相空间。我们强调使用$Δ_{4}$作为发现变量的优势,并提出了一个分析表明,配对的$Δ_{4}$与另一个不变的质量变量导致一个显着的改善,更传统的变量选择和技术。

英文摘要:

The lack of a new physics signal thus far at the Large Hadron Collider motivates us to consider how to look for challenging final states, with large Standard Model backgrounds and subtle kinematic features, such as cascade decays with compressed spectra. Adopting a benchmark SUSY-like decay topology with a four-body final state proceeding through a sequence of two-body decays via intermediate resonances, we focus our attention on the kinematic variable $Δ_{4}$ which previously has been used to parameterize the boundary of the allowed four-body phase space. We highlight the advantages of using $Δ_{4}$ as a discovery variable, and present an analysis suggesting that the pairing of $Δ_{4}$ with another invariant mass variable leads to a significant improvement over more conventional variable choices and techniques.

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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