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arXiv 0711.4526hep-ph
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利用横向质量扭折测量强子对撞机上的超粒子质量

Measuring superparticle masses at hadron collider using the transverse mass kink

Won Sang Cho, Kiwoon Choi, Yeong Gyun Kim, Chan Beom Park

摘要:

我们提出了一个详细的研究的对撞机可观测的$m_{T2}$应用对产生的超粒子衰变到可见粒子和一对不可见的最轻的超对称粒子(LSP)。导出了$m_{T2}$在所有事件上的最大值($m_{T2}^{\rm max}$)的解析表达式。值得注意的是,如果每个超粒子的衰变产物涉及一个以上的可见粒子,则$m_{T2}^{\rm max}$是{ \it试验} LSP质量的函数,${m}_χ$在${m}_χ=$真实LSP质量处具有扭结结构,其可以用于同时确定母超粒子质量和LSP质量。为了了解如何从对撞机数据中构造出$m_{T2}^{\rm max}$,对一些超粒子谱进行了胶子$m_{T2}$的蒙特卡罗分析。

英文摘要:

We present a detailed study of the collider observable $m_{T2}$ applied for pair-produced superparticles decaying to visible particles and a pair of invisible lightest supersymmetric particles (LSPs). Analytic expressions of the maximum of $m_{T2}$ over all events ($m_{T2}^{\rm max}$) are derived. It is noticed that if the decay product of each superparticle involves more than one visible particles, $m_{T2}^{\rm max}$ being a function of the {\it trial} LSP mass ${m}_χ$ has a kink structure at ${m}_χ=$ true LSP mass, which can be used to determine the mother superparticle mass and the LSP mass simultaneously. To see how well $m_{T2}^{\rm max}$ can be constructed from collider data, a Monte-Carlo analysis of the gluino $m_{T2}$ is performed for some superparticle spectra.

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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