论文标题
关于异常$ZZγ$和$Zγγ$耦合的模型无关的研究
Model-independent study on the anomalous $ZZγ$ and $Zγγ$ couplings at the future muon collider
论文作者
论文摘要
在这项研究中，我们研究了$μ^{ - }μ^{+} \ tozγ\ tozγ\ tozγ\ toν\barνγ$在未来的MUON撞机上使用3 tev的质量中心能量，以检查异常的$zzγ$和$zγγ$中性的triple triple egplings $ cp $ -cp-cp-cp-cp-cpving $ c _ {\ widetilde {b} w}/{λ^4} $耦合和三个$ cp $ -violating $ c_ {bb}/{λ^4} $，$ c_ {bw}/{bw}/{λ^4} $，$ C_ {所有信号和相关的背景事件都是在Madgraph中产生的，并通过Pythia进行了Parton淋浴和强壮。还通过Delphes中的调谐MUON检测器卡考虑了检测器效应。研究了敏感性的系统不确定性$ 0 \％$，$ 3 \％$和$ 5 \％$的影响。从该过程获得的最佳灵敏度$μ^{ - }μ^{+} \ tozγ\ tozγ\ tozγ\ to t \barνγ$是$ [ - 6.53; 6.53; 6.64] \ times10^{ - 2} $ tev $^{ - tev $^{ - 4} $ $ c _ {\ widetilde {b} w}/{λ^4} $耦合和$ [ - 2.47; 2.47; 2.47; 2.47; 2.47; 2.47; times10^{ - 2} $ $ [ - 2.20; 2.20] \ times10^{ - 1} $ tev $^{ - 4} $ on $ cp $ -conserving $ c_ {bb}/{λ^4} $，$ c_ {bw}/{bw}/{λ^4} $，$ c_ {www} $ c_ {ww}/c_ {ww} $ c {ww}/{λ^4} $ c。我们在异常的中性量规耦合方面获得的结果使更严格的灵敏度范围比当前的实验结果介于5到15倍的范围，而在未来的PP山脉（例如HL-LHC，HE-LHC和FCC-HH）的现象学研究中略高于现象学研究。另一方面，我们可以看到，预计将在未来的$ e^{ - } e^{+} $ calling（例如CLIC）获得异常中性量规耦合上的界限大约是我们的结果的2倍。
In this study, we investigate the potential of $μ^{-} μ^{+}\to Zγ\to ν\barνγ$ process at the future muon collider with a center-of-mass energy of 3 TeV to examine the anomalous $ZZγ$ and $Zγγ$ neutral triple gauge couplings defining $CP$-conserving $C_{\widetilde{B}W}/{Λ^4}$ coupling and three $CP$-violating $C_{BB}/{Λ^4}$, $C_{BW}/{Λ^4}$, $C_{WW}/{Λ^4}$ couplings. All signal and relevant background events are generated in MadGraph and passed through Pythia for parton showering and hadronization. Detector effects are also considered via tuned muon detector cards in Delphes. The effects of systematic uncertainties of $0\%$, $3\%$ and $5\%$ on the sensitivities are studied. The best sensitivities obtained from the process $μ^{-} μ^{+}\to Zγ\to ν\barνγ$ are $[-6.53;6.64]\times10^{-2}$ TeV$^{-4}$ on $CP$-conserving $C_{\widetilde{B}W}/{Λ^4}$ coupling and $[-2.47;2.47]\times10^{-2}$ TeV$^{-4}$, $[-8.46;8.46]\times10^{-2}$ TeV$^{-4}$ and $[-2.20;2.20]\times10^{-1}$ TeV$^{-4}$ on $CP$-conserving $C_{BB}/{Λ^4}$, $C_{BW}/{Λ^4}$, $C_{WW}/{Λ^4}$ couplings , respectively. Our obtained results on the anomalous neutral gauge couplings set more stringent sensitivity, ranging between 5 and 15 times than the current experimental results while slightly better than the phenomenological studies at future pp colliders such as the HL-LHC, the HE-LHC and the FCC-hh, respectively. On the other hand, we can see that the bounds on the anomalous neutral gauge couplings expected to be obtained for the future $e^{-}e^{+}$ colliders such as the CLIC are roughly 2 times better than our results.
