arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2012.15308hep-ph
收藏

在HL-LHC上类矢量Y夸克的单产生

Single Production of Vectorlike Y Quarks at the HL-LHC

V. Cetinkaya, A. Ozansoy, V. Ari, O. M. Ozsimsek, O. Cakir

摘要:

我们在高亮度大型强子对撞机(HL-LHC)上研究了带有电荷$|Q_{Y}|=4/3$的奇异类矢量$Y$夸克的单一产生及其随后的衰变。类矢量夸克(VLQ)衰变的中间态大多是电弱$W$玻色子。除了它们单独或成对的直接产生外,$W$ -玻色子还参与衰变链,这是顶夸克衰变的结果,对背景有贡献。这是特别的情况,因为矢量类$Y$夸克,估计产生的高截面,只能通过$W$玻色子和下型夸克($d,s,b$)衰变。我们计算了信号的截面(对于不同的耦合和质量值)和相关的标准模型(SM)背景。在对信号和背景事件进行快速模拟之后,(耦合值$κ_{Y}=0.5$的质量范围为1000-2500 GeV,耦合值$κ_{Y}=0.3$和$κ_{Y}=0.15$的质量范围为500-2000 GeV)已经在HL-LHC上提出,质心能量为$\sqrt{s}=14$ TeV,积分光度投影为300 fb $^{-1}$,1000 fb $^{-1}$和3000 fb $^{-1}$。

英文摘要:

We study single production of exotic vectorlike $Y$ quark with electric charge $|Q_{Y}|=4/3$ and its subsequent decay at the High Luminosity LHC (HL-LHC). Most of the vector like quark (VLQ) decays have the electroweak $W$ bosons in the intermediate state. Besides their direct productions singly or pairs, the $W$-bosons are involved in decay chains as a result of the decay of a top quark which contributes to the background. This is particularly the case since vectorlike $Y$ quark, which is estimated to be produced with a high cross-section, can only decay via a $W$ boson and a down type quark ($d,s,b$). We calculate the cross sections of signal (for different couplings and mass values) and relevant Standard Model (SM) backgrounds. After a fast simulation of signal and background events, estimations of the sensitivity to the parameters (mass range 1000-2500 GeV for coupling value $κ_{Y}=0.5$, and mass range 500-2000 GeV for coupling values $κ_{Y}=0.3$ and $κ_{Y}=0.15$) have been presented at the HL-LHC with center of mass energy $\sqrt{s}=14$ TeV and integrated luminosity projections of 300 fb$^{-1}$, 1000 fb$^{-1}$ and 3000 fb$^{-1}$.

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。

↑