论文标题
通过光子电子对撞机的振幅零来研究链球菌的产生
Investigating the Production of Leptoquarks by Means of Zeros of Amplitude at Photon Electron Collider
论文作者
论文摘要
Leptoquarks是解释风味物理各种异常的可能候选者之一。尽管如此，它们的存在尚未从实验方面得到证实。在本文中，我们展示了如何使用单光子树级幅度的零来提取有关leptoquarks的信息，以防$ e $ - $ - $γ$ colliders。少量的标准型号背景使信号在这种山着壁中保持清洁。与其他对山着人不同，此处的单光子振幅的零取决于$ \ sqrt {s} $以及leptoquark的质量以及其电荷。我们执行了基于毕达斯的模拟，以从其第一代衰减产物中重建leptoquark，并以100 fb $^{ - 1} $的光度估算背景。我们的分析是针对所有可以在$ e $ - $γ$对撞机上看到的Leptoquarks，具有三个不同的质量（70 GEV，650 GEV和1 TEV）和三个不同的动量中心（200 GEV，2 TEV，TEV和3 TEV）。也已经解决了非单色光子对激光反向散射和等效光子近似下振幅零的影响。
Leptoquarks are one of the possible candidates for explaining various anomalies in flavour physics. Nonetheless, their existence is yet to be confirmed from experimental side. In this paper we have shown how zeros of single photon tree-level amplitude can be used to extract information about leptoquarks in case of $e$-$γ$ colliders. Small number of standard model backgrounds keep the signal clean in this kind of colliders. Unlike other colliders, the zeros of single photon amplitude here depend on $\sqrt{s}$ as well as the mass of leptoquark along with its electric charge. We perform a PYTHIA based simulation for reconstructing the leptoquark from its decay products of first generation and estimating the background with luminosity of 100 fb$^{-1}$. Our analysis is done for all the leptoquarks that can be seen at $e$-$γ$ collider with three different masses (70 GeV, 650 GeV and 1 TeV) and three different centre of momentum energy (200 GeV, 2 TeV and 3 TeV). The effects of non-monochromatic photons on the zeros of amplitude under laser backscattering and equivalent photon approximation have also been addressed.
