论文标题
测试异常的$ H-W $耦合和Higgs通过double和Triple Higgs生产$ E^+E^ - $ Colliders测试Higgs自耦合
Testing anomalous $H-W$ couplings and Higgs self-couplings via double and triple Higgs production at $e^+e^-$ colliders
论文作者
论文摘要
在目前的工作中，我们研究了未来的$ e^+e^ - $ $ $ $ collider的互动顶点$ wwh $，$ wwhh $，$ hhh $和$ hhhh $，在electroweak手法拉格吉尼亚人提供的非线性有效现场理论的背景下。这些顶点由四个参数，$ a $，$ b $，$κ_3$和$κ_4$给出，它们是独立的，并且在这种非线性有效的Lagrangian环境中没有任何限制，鉴于Higgs字段是单身人士。这与标准模型形成鲜明对比，其中顶点与$ v_ {wwh}^{\ rm sm} = v v_ {wwhh}^{\ rm sm} $和$ v_ {hhh}^{\ rm sm} = v_} = v v v v v v v v v v v v v v v v v v_ {我们调查了在电动性手性拉格朗日病例中缺乏这些关系的含义。我们探讨了这些山脉两个主要通道中对这些希格斯异常耦合的敏感性：双重和三重希格斯的产生（加上中微子）。具体而言，我们研究了$ a $ a和$ b $ in $ e^+e^ - \ tohhν\barν$的访问权限，以及$ e^+e^ - \ e^+e^ - \ in $ e^+e^ - tohhhνν\barν$中的$κ__3$和$κ_4$。我们通过$ e^+e^ - $ colliders对超越标准模型耦合的超出标准模型耦合是新颖的，并且首次展示了四分之一的higgs自耦合的可访问性。
In the present work we study the implications at the future $e^+e^-$ colliders of the modified interaction vertices $WWH$, $WWHH$, $HHH$ and $HHHH$ within the context of the non-linear effective field theory given by the Electroweak Chiral Lagrangian. These vertices are given by four parameters, $a$, $b$, $κ_3$ and $κ_4$, respectively, that are independent and without any constraint from symmetry considerations in this non-linear effective Lagrangian context, given the fact the Higgs field is a singlet. This is in contrast to the Standard Model, where the vertices are related by $V_{WWH}^{\rm SM}=v V_{WWHH}^{\rm SM}$ and $V_{HHH}^{\rm SM}=v V_{HHHH}^{\rm SM}$, with $v=246$ GeV. We investigate the implications of the absence of these relations in the Electroweak Chiral Lagrangian case. We explore the sensitivity to these Higgs anomalous couplings in the two main channels at these colliders: double and triple Higgs production (plus neutrinos). Concretely, we study the access to $a$ and $b$ in $e^+e^- \to HH ν\barν$ and the access to $κ_3$ and $κ_4$ in $e^+e^- \to HHH ν\barν$. Our study of the beyond the Standard Model couplings via triple Higgs boson production at $e^+e^-$ colliders is novel and shows for the first time the possible accessibility to the quartic Higgs self-coupling.
