论文标题
$(g-2)_μ$ $ $异常在$μ$ $ $的2hdm中,带有vector和lepton等载体和现象学的影响
Investigation of $(g-2)_μ$ anomaly in the $μ$-specific 2HDM with Vector like leptons and the phenomenological implications
论文作者
论文摘要
在SM中,Muons的异常磁矩一直是一个长期存在的问题。 $(G-2)_ $从标准模型预测的当前实验值偏差正好为$4.2σ$。两种Higgs双重模型可以容纳这种差异,但是这种类型的模型自然会产生变化的中性电流(FCNC)。为了防止这种情况,假定没有FCNC的2HDM要求给定电荷夫妇的所有费用都可以到同一Higgs Boson上,但是在Muon特定的两个Higgs Doublet模型中,规则中断了,其中所有费米斯夫妇除了MUON夫妇到一个Higgs Doublet和其他Higgs Doublet Doublet Doublet。 MUON特定的两个Higgs Doublet模型解释了MUON异常,并具有非常大的$ \tanβ$值的微调问题,并带有其他参数。我们通过使用像Lepton Generation这样的向量扩展了该模型的简单解决方案,该模型可以解释低$ \tanβ$值的MUON异常,并在当前的实验性和理论约束的阴影下,用重的伪scaludo scalar higgs玻色子。此外,借助基于剪切的分析和多元分析方法,我们还试图阐明在LHC实验中,向载体Lepton Decay的潜在实验签名到重型Higgs Boson。我们已经表明,多变量分析可以将载体像瘦小的信号意义增加高达数量级,而不是基于剪切的分析。
The anomalous magnetic moment of muons has been a long-standing problem in SM. The current deviation of experimental value of the $(g-2)_μ$ from the standard model prediction is exactly $4.2σ$. Two Higgs Doublet Models can accommodate this discrepancy but such type of model naturally generate flavor changing neutral current(FCNC). To prevent this it was postulated that 2HDM without FCNC required that all fermions of a given charge couple to the same Higgs boson but the rule breaks in Muon Specific Two Higgs Doublet Model where all fermions except muon couple to one Higgs doublet and muon with the other Higgs doublet. The Muon Specific Two Higgs Doublet model explain muon anomaly with a fine tuning problem of very large $\tanβ$ value with other parameters. We have found a simple solution of this fine tuning problem by extending this model with a vector like lepton generation which could explain the muon anomaly at low $\tanβ$ value with a heavy pseudo scalar Higgs boson under the shadow of current experimental and theoretical constraints. Moreover, with the help of the cut based analysis and multivariate analysis methods, we have also attempted to shed some light on the potential experimental signature of vector lepton decay to the heavy Higgs boson in the LHC experiment. We have showed that a multivariate analysis can increase the vector like leptons signal significance by up to an order of magnitude than that of a cut based analysis.