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Search for vector-like T quark through th channel at eγ collider
Nuclear Physics B ( IF 2.8 ) Pub Date : 2020-05-26 , DOI: 10.1016/j.nuclphysb.2020.115058
Liangliang Shang , Wei Wei , Bingfang Yang

In an extension of the Standard Model with vector-like top partner, we investigate the vector-like top quark partner T via the channel eγbνeT¯(t¯h) at future linear collider. Due to the larger production rates than unpolarized beams, we calculate the production cross sections in polarized beams at s=2 and 3 TeV. We make a fast detector simulation for signal and background events and take a set of appropriate kinematic variables to enhance the signal significance. When the initial state radiation and beamstrahlung effects are in charge, we find that the correlated region g[0.33,0.5] ([0.14,0.5]) and mT[1300GeV,1480GeV] ([1300GeV,1900GeV]) can be excluded at 2σ level with the integrated luminosity 600fb1 (3000fb1) at s=2 TeV. When the center-mass energy s is upgraded to 3 TeV, the excluded region is expanded to g[0.3,0.5] ([0.14,0.5]) and mT[1300GeV,1940GeV] ([1300GeV,2000GeV]) with the integrated luminosity 600fb1 (3000fb1). Besides, we find the 5σ discovery correlated region is g[0.30,0.5] ([0.27,0.5]) and mT[1300GeV,1500GeV] ([1300GeV,2000GeV]) with the integrated luminosity 3000fb1 at s=2 TeV (3 TeV).



中文翻译:

对撞机上通过th通道搜索类似矢量的T夸克

在标准模型的扩展中,像矢量一样的顶级伴侣,我们通过通道研究了像矢量一样的顶级夸克伴侣TË-γbνËŤ¯Ť¯H在未来的线性对撞机上。由于生产率比非偏振光束大,因此我们计算了s=2和3 TeV。我们对信号和背景事件进行了快速检测器仿真,并采用了一组适当的运动学变量来增强信号的重要性。当初始状态下的辐射和束致伸缩效应负责时,我们发现相关区域G[0.330.5][0.140.5])和 Ť[1300GeV1480GeV][1300GeV1900年GeV])可以以的亮度排除在外600fb-1个3000fb-1个) 在 s=2TeV。当中心质量能量s 升级到3 TeV,排除区域扩展到 G[0.30.5][0.140.5])和 Ť[1300GeV1940年GeV][1300GeV2000GeV])的综合亮度 600fb-1个3000fb-1个)。此外,我们发现发现相关区域为G[0.300.5][0.270.5])和 Ť[1300GeV1500GeV][1300GeV2000GeV])的综合亮度 3000fb-1个s=2 TeV(3 TeV)。

更新日期:2020-05-26
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