arXiv 0808.04772008-08hep-ph

在$e^{+} e^{-}$对撞机上测量Higgs-矢量玻色子耦合

Measuring the Higgs-Vector boson Couplings at Linear $e^{+} e^{-}$ Collider

Sukanta Dutta, Kaoru Hagiwara, Yu Matsumoto

备注：: 80 pages and 11 Figures. to appear in Physical Review D1
发表信息：: Phys.Rev.D78:115016,2008
DOI：: 10.1103/PhysRevD.78.115016

摘要：

我们估计的准确性，CP偶数维6运营商涉及希格斯粒子和两个矢量玻色子（HVV）的系数可以在线性$e^+ e^-$对撞机测量。使用最佳观测量的方法的运动分布，我们的分析是基于五个不同的过程。第一个是t-通道中的WW融合过程（$e^+e^- \to \barν_e ν_e H$），其中我们使用希格斯玻色子的快度y和横动量$\pT$作为观测量。第二个是在s通道中的ZH对产生过程，其中我们使用Z和Z衰变角分布的散射角，再现了以前的研究结果。第三个是t通道ZZ，融合过程（$e^+e^- \to e^+e^ -H$），其中我们使用标记的$e^+$和$e^-$的能量和角分布。第四章考虑了无标记$e^+e^-H$事例的快度分布，它可以很好地近似为$e^+$和$e^-$束的韧致辐射光子的$γγ$融合。作为最后一个过程，我们考虑单个标记的$e^+e^- H$事件，它探测$γe^{\pm} \to H e^{\pm}$过程。所有的结果是在这样一种方式，有效的耦合和它们的相关性的约束的统计误差被读出时，所有这些都被允许同时变化，对于上述过程中的每一个，为$m_H=120 $ GeV，在$\sqrt{s}=250\GEV$，$350\GEV$ $500\GEV$和$1\TEV$，有和没有$e^-$光束偏振80%。

英文摘要：

We estimate the accuracy with which the coefficient of the CP even dimension six operators involving Higgs and two vector bosons (HVV) can be measured at linear $e^+ e^-$ colliders. Using the optimal observables method for the kinematic distributions, our analysis is based on the five different processes. First is the WW fusion process in the t-channel ($e^+e^- \to \barν_e ν_e H$), where we use the rapidity y and the transverse momentum $\pT$ of the Higgs boson as observables. Second is the ZH pair production process in the s-channel, where we use the scattering angle of the Z and the Z decay angular distributions, reproducing the results of the previous studies. Third is the t-channel ZZ, fusion processes ($e^+e^- \to e^+e^ -H$), where we use the energy and angular distributions of the tagged $e^+$ and $e^-$. In the fourth, we consider the rapidity distribution of the untagged $e^+e^-H$ events, which can be approximated well as the $γγ$ fusion of the bremsstrahlung photons from $e^+$ and $e^-$ beams. As the last process,we consider the single tagged $e^+e^- H$ events, which probe the $γe^{\pm} \to H e^{\pm}$ process. All the results are presented in such a way that statistical errors of the constraints on the effective couplings and their correlations are read off when all of them are allowed to vary simultaneously, for each of the above processes, for $m_H=120 $ GeV, at $\sqrt{s}=250\GEV$, $350\GEV$ $500\GEV$ and $1\TEV$, with and without $e^-$ beam polarization of 80%.

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。

摘要：

英文摘要：

相关论文