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arXiv 0909.1586hep-ph
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在LHC生产Z+4j、W \pm W \pm +0/2j和W+ W- +2j中的多部分子相互作用

Multiple Parton Interactions in Z+4j, W\pm W\pm +0/2j and W+ W- +2j production at the LHC

Ezio Maina

摘要:

在LHC中,多重部分子相互作用(MPI)的预期速率很大。这需要估计它们对LHC预见的所有测量的影响。相反,它提供了在LHC上研究MPI的新手段。在本文中,我们研究MPI在LHC中的作用,设计能量为14 TeV,在- Z生产与四个射流,- W \pm W \pm与零或两个射流。-W+ W-与两架喷气式飞机相关。在所有的情况下,矢量玻色子都被假定为轻子衰变。MPI对Z+4j的贡献主要由具有平衡横向动量的两个喷流的事件决定。与单一相互作用过程相比,通过选择在横向平面中具有较大分离的两个射流的事件,MPI可以实现接近20%的良好的信号背景比。对应的统计显著性为1倒数fb的亮度是约6.9 μ + μ-通道单独。最后的状态通道,其中只有两个相同的符号高横向动量带电轻子是必需的,并否决了额外的硬喷流是由MPI占主导地位,预计产量的2500事件与完整的LHC光度。

英文摘要:

The expected rate for Multiple Parton Interactions (MPI) at the LHC is large. This requires an estimate of their impact on all measurement foreseen at the LHC. Conversely it provides new means of studying MPI at the LHC. In this paper we examine the role of MPI at the LHC, with the design energy of 14 TeV, in - Z production in association with four jets, - W\pm W\pm in association with zero or two jets. -W+ W- in association with two jets. In all cases the vector bosons are assumed to decay leptonically. The MPI contribution to Z+4j is dominated by events with two jets with balancing transverse momentum. It is possible to achieve a good signal to background ratio, close to 20%, for MPI compared to Single Interaction processes by selecting events with two jets with large separation in the transverse plane. The corresponding statistical significance for a luminosity of 1 inverse fb is about 6.9 for the mu+mu- channel alone. The final state channel in which only two same-sign high transverse momentum charged leptons are required and additional hard jets are vetoed is dominated by MPI, with an expected yield of 2500 events with the full LHC luminosity.

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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