论文标题
$ m_ {t2} $作为$ h \ rightarrowττ$在LHC中的CP阶段的探测
$M_{T2}$ as a probe of CP phase in $h \rightarrow ττ$ at the LHC
论文作者
论文摘要
我们建议利用横向质量变量$ m_ {t2} $，并将其后代$ m_ {2cons} $用于约束LHC的Tau Lepton Yukawa耦合的CP混合。我们已经考虑了由Higgs玻色子产生的Tau Lepton对，每个tau腐烂到带电的亲和中微子，$τ^{\ pm} \rightarrowπ^{\ pm pm}ν_τ$。最近，对于此通道，LHC采用了冲击参数方法来测量Tau Lepton Yukawa耦合的CP混合角与较大的不确定性。我们在这里提出的可观察物可以在实验室框架中测量，而无需影响参数测量，然后对Tau Lepton Yukawa的CP混合进行补充探针。使用我们的方法，CP混合角可以约束至17 $^{\ circ} $（7 $^{\ circ} $），使用14 LHC的集成亮度的300（3000）$ fb^{ - 1} $。
We propose to utilize the transverse mass variable $M_{T2}$ and it's descendant $M_{2Cons}$ for constraining the CP admixture of the tau lepton Yukawa coupling at the LHC. We have considered the tau lepton pair produced from the Higgs boson with each tau decays to a charged pion and a neutrino, $τ^{\pm} \rightarrow π^{\pm} ν_τ$. Recently, for this channel, the LHC has employed the impact parameter method to measure the CP mixing angle of tau lepton Yukawa coupling with large uncertainty. The observables we propose here can be measured in the lab frame without the impact parameter measurement and in turn, give a complementary probe of the CP admixture of tau lepton Yukawa. The CP mixing angle, with our method, can be constrained up to 17$^{\circ}$ (7$^{\circ}$) with 300 (3000) $fb^{-1}$ of integrated luminosity at the 14 LHC.
