对$hb\overline{b}$偶联错误符号的重新评价及对$h \rightarrow Z γ$的研究
A reappraisal of the wrong-sign $hb\overline{b}$ coupling and the study of $h \rightarrow Z γ$
摘要：
最近有人指出，目前的实验仍然允许两个希格斯偶极子模型，其中$h b \bar{b}$耦合（$k_D m_b/v$）是负的;与标准模型的符号相反。由于延迟解耦在$h H^+ H^-$耦合中的重要性，$h \rightarrow γγ$改进的测量将对这个问题产生强烈的影响。出于同样的原因，对$h \rightarrow Z γ$的测量甚至界限也可能是令人感兴趣的。在本文中，我们将重新讨论这个问题，强调$h \rightarrow VV$的至关重要性，这可以通过简单的论证来理解。我们发现，对$k_D<0$模型的影响都$h \rightarrow b \bar{b}$和$h \rightarrow τ^+ τ^-$是非常敏感的胶子融合生产机制的输入值，相比之下，$h \rightarrow γγ$和$h \rightarrow Z γ$不是。我们还询问搜索$h \rightarrow Z γ$及其与$h \rightarrow γγ$的相互作用是否会影响$h b \bar{b}$耦合的符号。最后，我们研究这些问题的背景下翻转的两个希格斯偶极子模型。
英文摘要：
It has been pointed out recently that current experiments still allow for a two Higgs doublet model where the $h b \bar{b}$ coupling ($k_D m_b/v$) is negative; a sign opposite to that of the Standard Model. Due to the importance of delayed decoupling in the $h H^+ H^-$ coupling, $h \rightarrow γγ$ improved measurements will have a strong impact on this issue. For the same reason, measurements or even bounds on $h \rightarrow Z γ$ are potentially interesting. In this article, we revisit this problem, highlighting the crucial importance of $h \rightarrow VV$, which can be understood with simple arguments. We show that the impacts on $k_D<0$ models of both $h \rightarrow b \bar{b}$ and $h \rightarrow τ^+ τ^-$ are very sensitive to input values for the gluon fusion production mechanism; in contrast, $h \rightarrow γγ$ and $h \rightarrow Z γ$ are not. We also inquire if the search for $h \rightarrow Z γ$ and its interplay with $h \rightarrow γγ$ will impact the sign of the $h b \bar{b}$ coupling. Finally, we study these issues in the context of the Flipped two Higgs doublet model.
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。
