论文标题
在具有扩展标量扇区的模型中，对希格斯三线性耦合的双环校正
Two-loop corrections to the Higgs trilinear coupling in models with extended scalar sectors
论文作者
论文摘要
希格斯三联耦合提供了一个独特的机会，可以研究希格斯扇区的结构和探测BSM物理学的间接迹象 - 即使新状态以某种方式隐藏了。在具有扩展希格斯扇区的模型中，由于涉及其他标量状态的辐射校正效果，希格斯三联耦合中的较大偏差可能会出现在一个循环中。因此，自然要问两层校正如何修改此结果，以及新的大型校正是否可以再次出现。我们在具有扩展标量扇区的几个模型中，对HIGGS三联耦合的主要两环校正提出了新的结果。我们用数值示例说明了分析表达式，并表明它们仍然比单循环对应物小，并且没有在一个环上观察到的非耦合效应，但两循环校正并不完全可忽略 - 典型的尺寸为单循环校正的10-20％。
The Higgs trilinear coupling provides a unique opportunity to study the structure of the Higgs sector and probe indirect signs of BSM Physics -- even if new states are somehow hidden. In models with extended Higgs sectors, large deviations in the Higgs trilinear coupling can appear at one loop because of non-decoupling effects in the radiative corrections involving the additional scalar states. It is then natural to ask how two-loop corrections modify this result, and whether new large corrections can appear again. We present new results on the dominant two-loop corrections to the Higgs trilinear coupling in several models with extended scalar sectors. We illustrate the analytical expressions with numerical examples and show that, while they remain smaller than their one-loop counterparts and do not modify significantly the non-decoupling effects observed at one loop, the two-loop corrections are not entirely negligible -- a typical size being 10-20% of the one-loop corrections.
