最小膨胀子模型中未来希格斯工厂的希格斯辐射产生过程e^+ e^- \to Z h
Higgs-strahlung production process e^+ e^- \to Z h at the future Higgs factory in the Minimal Dilaton Model
摘要：
我们研究了在未来的希格斯工厂如TLEP中的希格斯辐射产生过程e^+ e^- \to Zh，方法是在最小膨胀子模型（MDM）中加入辐射修正，MDM将SM扩展为一个称为Ep子的单重标量。我们考虑了模型的各种理论和实验约束，并对来自ATLAS，CMS和CDF+ D 0的希格斯数据进行拟合。然后，对于1σ存活的样品，我们计算了240 GeV Higgs工厂的包含产生率σ（e^+e^- \to Zh）的MDM预言，以及当希格斯玻色子衰变为b \bar b和γγ时，e^+e^- \to Zh的信号率。我们有以下意见：（1）在重Higgs粒子情况下，σ（e^+e^- \to Zh）与SM预言的偏差在-15%~85%之间，这主要是由于树能级hZZ耦合的修正和可能的大Higgs自耦合引起的辐射修正。(2)希格斯工厂的e^+e^- \to Zh过程和14 TeV LHC的pp \to hh过程在限制MDM参数空间方面是互补的。要求σ（e^+e^- \to Zh）与其SM预测的偏差小于1\%并且σ（p p \to h h）的偏差小于50\%，MDM中的\tan θ_S将被限制为-0.1< \tan θ_S<0.3，并且信号速率的偏差被约束为|R_{b\bar b}| <2%，|R_{γγ}| <7%。特别是，规范化到其SM预测的希格斯自耦合现在的上限约为4。(3)在光散射场景中，σ（e^+e^- \to Zh）的偏差可能达到-7\%，并且要求其大小小于1\%将导致0< \tan θ_S<0.1，并且-10\% < R_{b\bar b}，R_{γγ} < 1\%。
英文摘要：
We investigate the Higgs-strahlung production process e^+ e^- \to Z h at the future Higgs factory such as TLEP by including radiative corrections in the Minimal Dilaton Model (MDM), which extends the SM by one singlet scalar called dilaton. We consider various theoretical and experimental constraints on the model, and perform fits to the Higgs data taken from ATLAS, CMS and CDF+D0. Then for the 1σsurviving samples, we calculate the MDM predictions on the inclusive production rate σ(e^+e^-\to Zh) at the 240-GeV Higgs factory, and also the signal rates of e^+e^-\to Zh with the Higgs boson decaying to b\bar b and γγ. We have following observations: (1) In the heavy dilaton scenario, the deviation of σ(e^+e^-\to Zh) from its SM prediction can vary from -15\% to 85\%, which mainly arises from the modification of the tree-level hZZ coupling and also the radiative correction induced by possibly large Higgs self-couplings. (2) The processes e^+e^-\to Zh at the Higgs factory and pp\to hh at 14-TeV LHC are complementary in limiting the MDM parameter space. Requiring the deviation of σ(e^+e^-\to Zh) from its SM prediction to be less than 1\% and that of σ(p p \to h h) to be less than 50\%, \tan θ_S in the MDM will be limited to be -0.1<\tanθ_S<0.3, and the deviations of the signal rates are constrained to be |R_{b\bar b}|<2\% and |R_{γγ}|<7\%. Especially, the Higgs self-coupling normalized to its SM prediction is now upper bounded by about 4. (3) In the light dilaton scenario, the deviation of σ(e^+e^-\to Zh) may reach -7\%, and requiring its size to be less than 1\% will result in 0<\tanθ_S<0.1, and -10\% < R_{b\bar b}, R_{γγ} < 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。
