发表机构
National Institute of Technology, Fukushima College; Technion – Israel Institute of Technology（福岛国立工业大学; 以色列理工学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究探讨非退耦有效场论（naHEFT）驱动的电弱相变，并分析引力波观测能否探测由退耦效应（如SMEFT维度六算符）引起的希格斯势小修正，通过Fisher矩阵评估DECIGO和BBO的灵敏度。
AI 中文摘要
引力波（GW）观测为探索与强一级电弱相变相关的新物理提供了有前景的探针。直接搜索的零结果和精密测量的约束，加上对希格斯自相互作用的约束相对较弱，促使人们考虑这样一种情景：希格斯势中的非退耦效应与额外的退耦新物理共存。先前在标准模型有效场论（SMEFT）框架内的Fisher矩阵研究已经探讨了未来引力波观测对新物理的灵敏度，重点关注由维度六算符$(H^\dagger H)^3$驱动的相变。然而，在与这类相变相关的参数区域中，截断的EFT展开的有效性可能受到质疑。我们转而考虑由近对齐希格斯有效场论（naHEFT）描述的非退耦效应驱动的相变。我们研究引力波观测能否探测到由希格斯自相互作用以外的相互作用中的退耦效应引起的希格斯有效势的小修正。作为额外退耦效应的代表性基准，我们考虑维度六SMEFT算符$(H^\dagger H)(\overline{q}_3 t_R\widetilde{H})$，其Wilson系数为$C_{uH}$。尽管我们聚焦于这一基准，但同样的框架可应用于其他维度六SMEFT算符。我们对DECIGO和BBO进行了双参数Fisher矩阵分析，以量化它们对$C_{uH}$和naHEFT质量标度$\Lambda$的预期灵敏度。对于所考虑的基准配置，非退耦动力学产生了可探测的引力波信号。我们发现，即使考虑了$C_{uH}$与$\Lambda$之间的相关性，这些小修正也能在引力波谱中产生潜在可测量的变化。
英文摘要
Gravitational-wave (GW) observations offer a promising probe of new physics associated with a strong first-order electroweak phase transition. Null results from direct searches and constraints from precision measurements, together with the comparatively weak constraints on Higgs self-interactions, motivate scenarios in which non-decoupling effects in the Higgs potential coexist with additional decoupling new physics. Previous Fisher matrix studies within the Standard Model effective field theory (SMEFT) have explored the sensitivity of future GW observations to new physics, focusing on transitions driven by the dimension-six operator $(H^\dagger H)^3$. However, the validity of the truncated EFT expansion can become questionable in the parameter regions relevant to such transitions. We instead consider transitions driven by non-decoupling effects described by the nearly aligned Higgs effective field theory (naHEFT). We investigate whether GW observations can probe small corrections to the Higgs effective potential induced by decoupling effects in interactions other than Higgs self-interactions. As a representative benchmark for additional decoupling effects, we consider the dimension-six SMEFT operator $(H^\dagger H)(\overline{q}_3 t_R\widetilde{H})$ with Wilson coefficient $C_{uH}$. Although we focus on this benchmark, the same framework can be applied to other dimension-six SMEFT operators. We perform two-parameter Fisher matrix analyses for DECIGO and BBO to quantify their expected sensitivity to $C_{uH}$ and the naHEFT mass scale $Λ$. For the benchmark configurations considered, the non-decoupling dynamics generates a detectable GW signal. We find that these small corrections can produce potentially measurable changes in the GW spectrum, even after accounting for the correlation between $C_{uH}$ and $Λ$.
Comments29 pages, 7 figures
