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arXiv 2012.05730hep-ph
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扩展标量扇区模型中Higgs三线性耦合的双环修正

Two-loop corrections to the Higgs trilinear coupling in models with extended scalar sectors

Johannes Braathen, Shinya Kanemura

摘要:

希格斯三线耦合提供了一个独特的机会来研究希格斯扇区的结构和探测BSM物理学的间接迹象-即使新的状态以某种方式隐藏。在具有扩展希格斯扇区的模型中,由于涉及额外标量态的辐射校正中的非去耦效应,希格斯三线性耦合的大偏差可能出现在一个环中。然后,很自然地会问,双回路修正如何修改这个结果,以及新的大修正是否会再次出现。我们提出了几个具有扩展标量扇区的模型中希格斯三线性耦合的主导双环修正的新结果。我们用数值例子说明了解析表达式,并表明,虽然它们仍然小于单回路对应物,并且不会显著修改在一个回路处观察到的非解耦效应,但双回路校正并不完全可以忽略不计-典型的大小为单回路校正的10-20%。

英文摘要:

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.

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。

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