通过单态标量扩展精修引力波与对撞机物理对话
Refining Gravitational Wave and Collider Physics Dialogue via Singlet Scalar Extension
AI总结：
本文利用有效场论和实单态扩展标准模型，首次考虑双圈修正计算一阶电弱相变的热参数与引力波谱，发现HL-LHC双Higgs产生信号与LISA引力波探测区域显著重叠，两者可相互印证或排除。
摘要：
利用有效场论技术，我们推进了进入一阶电弱相变引力波谱预测的热参数计算。在实单态扩展标准模型中，我们利用最近的格点模拟确认了自由参数空间中一阶相变的存在。我们首次在确定热参数的高温展开中考虑了几个重要的双圈修正，包括局部热平衡近似下的气泡壁速度。我们发现，完成气泡核化的要求对新标量玻色子质量施加了严格界限。此外，LISA的探测前景要求在两步相变中发生一阶相变，这显示出对Higgs与单态之间门户耦合的强敏感性。有趣的是，HL-LHC上的双Higgs玻色子产生信号探测的参数区域与LISA敏感区域显著重叠，表明如果探测到，有可能同时解释这两种信号。相反，根据混合角，HL-LHC上双Higgs产生的零结果可能排除该模型作为引力波观测的解释。
英文摘要：
Employing effective field theory techniques, we advance computations of thermal parameters that enter predictions for the gravitational wave spectra from first-order electroweak phase transitions. Working with the real-singlet-extended Standard Model, we utilize recent lattice simulations to confirm the existence of first-order phase transitions across the free parameter space. For the first time, we account for several important two-loop corrections in the high-temperature expansion for determining thermal parameters, including the bubble wall velocity in the local thermal equilibrium approximation. We find that the requirement of completing bubble nucleation imposes stringent bounds on the new scalar boson mass. Moreover, the prospects for detection by LISA require first-order phase transitions in a two-step phase transition, which display strong sensitivity to the portal coupling between the Higgs and the singlet. Interestingly, signals from di-Higgs boson production at the HL-LHC probe parameter regions that significantly overlap with the LISA-sensitive region, indicating the possibility of accounting for both signals if detected. Conversely, depending on the mixing angle, a null result for di-Higgs production at the HL-LHC could potentially rule out the model as an explanation for gravitational wave observations.
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