论文标题
2HDM中的三重希格斯耦合：完整的图片
Triple Higgs Couplings in the 2HDM: The Complete Picture
论文作者
论文摘要
三重希格斯耦合的测量是（HL-）LHC和Future Lepton Colliders的主要任务之一。同样，涉及BSM Higgs玻色子的三重希格斯耦合也很高。在两个Higgs Doublet模型（2HDM）的框架内，我们研究了所有三重希格斯耦合的允许范围，涉及至少一个光，类似Sm的Higgs Boson。我们新提出2HDM III和IV的允许范围，并在类型I和II中更新结果。我们考虑了来自单位性和稳定性的理论约束，直接BSM Higgs-Boson搜索的实验约束，LHC上Smlike Higgs-Boson速率的测量以及风味可观察到的物品和Electroweak Precision Precision Data。对于Sm-type Triple Higgs耦合W.R.T.它的SM值，$λ_{HHH}/λ_{HHH}^\ Mathrm {Smrm {Sm} $，我们在其他Yukawa类型中找到了$ \ sim [-0.5,1.3] $ in Type〜I和$ \ sim [0.5,1.0]的允许间隔。这些允许的范围对未来对撞机实验的实验确定该耦合具有重要意义。我们在四种Yukawa类型中找到$ \ sim -1.5 $和$ \ sim +1.5 $之间的$λ_{hhh} $。对于涉及两个重型中性希格斯玻色子的三重希格斯耦合，$λ_{hhh} $和$λ_{haa} $我们找到$ \ sim -0.5 $和$ \ sim 16 $，以及$ \ sim -1 $ -1 $ -1 $和$ \ sim 32 $ for $ s 32 $ for $ c $ c $λ_______________hh^$ HH^ - 这些潜在的大值可能会导致在HL-LHC或高能Lepton Colliders上强烈增强两个HigGS玻璃体的产生。
The measurement of the triple Higgs coupling is one of the main tasks of the (HL-)LHC and future lepton colliders. Similarly, triple Higgs couplings involving BSM Higgs bosons are of high interest. Within the framework of Two Higgs Doublet Models (2HDM) we investigate the allowed ranges for all triple Higgs couplings involving at least one light, SM-like Higgs boson. We present newly the allowed ranges for 2HDM type III and IV and update the results within the type I and II. We take into account theoretical constraints from unitarity and stability, experimental constraints from direct BSM Higgs-boson searches, measurements of the rates of the SM-like Higgs-boson at the LHC, as well as flavor observables and electroweak precision data. For the SM-type triple Higgs coupling w.r.t. its SM value, $λ_{hhh}/λ_{hhh}^\mathrm{SM}$, we find allowed intervals of $\sim [-0.5,1.3]$ in type~I and $\sim [0.5,1.0]$ in the other Yukawa types. These allowed ranges have important implications for the experimental determination of this coupling at future collider experiments. We find the coupling $λ_{hhH}$ between $\sim -1.5$ and $\sim +1.5$ in the four Yukawa types. For the triple Higgs couplings involving two heavy neutral Higgs bosons, $λ_{hHH}$ and $λ_{hAA}$ we find values between $\sim -0.5$ and $\sim 16$, and between $\sim -1$ and $\sim 32$ for $λ_{hH^+H^-}$. These potentially large values could lead to strongly enhanced production of two Higgs-bosons at the HL-LHC or high-energy lepton colliders.
