论文标题
用基于矩阵元素的运动学判别剂探测higgs门户网站，$ zz \ t 4 \ ell $ production
Probing Higgs portals with matrix-element based kinematic discriminants in $ZZ \to 4 \ell$ production
论文作者
论文摘要
Higgs门户的运算符$ | H |^2 $的形式提供了最小的和理论上动机的链接（SM）和新物理学之间。虽然Higgs门户可能会被异国情调的Higgs衰变很好地限制，但如果超出SM状态是光明的，则众所周知，这些颗粒在运动学上是无法访问的测试场景是具有挑战性的。我们探讨了未来的强子对撞机测量值的敏感性$ zz \至4 \ ell $ $生产，以限制Higgs门户相互作用。结果表明，通过使用基于基质元素的运动学判别，与基于基于四个lepton不变质量质谱的测量的研究相比，大型强子撞机（LHC）的高光度选项（LHC）的范围可以显着增强。我们还分析了LHC高能升级的潜力以及将来的圆形撞机，以将新物理学限制为$ | h |^2 $。将所获得的约束与人们期望从其他单higgs探针中找到的限制进行了比较。此外，我们对双Higgs生产中相关的HIGGS门户效应提供了独立的分析。我们发现，从我们的$ zz \到4 \ ell $分析中获得的约束结果既具有竞争力，又与使用其他搜索技术获得的预计限制相辅相成。
A Higgs portal in the form of the operator $|H|^2$ provides a minimal and theoretically motivated link between the Standard Model (SM) and new physics. While Higgs portals can be constrained well by exotic Higgs decays if the beyond-the-SM states are light, testing scenarios where these particles are kinematically inaccessible is known to be challenging. We explore the sensitivity of future hadron collider measurements of $ZZ \to 4 \ell$ production in constraining Higgs portal interactions. It is shown that by using a matrix-element based kinematic discriminant the reach of the high-luminosity option of the Large Hadron Collider (LHC) can be significantly enhanced compared to studies that are based on measurements of the four-lepton invariant mass spectrum alone. We also analyse the potential of the high-energy upgrade of the LHC and a Future Circular Collider in constraining new physics that couples to $|H|^2$. The obtained constraints are compared to the limits one expects to find from other single-Higgs probes. In addition, we provide an independent analysis of the relevant Higgs portal effects in double-Higgs production. We find that the constraints obtained from our $ZZ \to 4 \ell$ analysis turn out to be both competitive with and complementary to the projected limits obtained using other search techniques.
