论文标题
强烈的一阶电子相过渡到相对沉重的额外希格斯玻色子
Strongly first-order electroweak phase transition by relatively heavy additional Higgs bosons
论文作者
论文摘要
我们讨论了具有相对较重的额外标量玻色子的模型中具有扩展希格斯扇区的模型中的一阶电子相变。我们首先表明，通过SphaLeron去耦条件，扰动单位性和真空稳定性的组合，即使在对齐极限处的最轻的Higgs玻色子的表现也完全像在树水平上的sm higgs boson一样，也可以在TEV尺度上获得其他标量玻色子上的质量上限。然后，我们与其他标量玻色子一起讨论了该病例的现象学影响，质量近1 TEV。即使在强子山子的当前和将来的实验中直接检测到它们太重时，由于这种额外的额外的希格斯玻色子的量子效应，Triple Higgs玻色子偶联的较大偏差也可能是一阶相变的签名。另一方面，与较低的其他标量玻色子相比，在这种情况下，发现来自一阶相变的重力波较弱。
We discuss first-order electroweak phase transition in models with extended Higgs sectors for the case with relatively heavy additional scalar bosons. We first show that, by the combination of the sphaleron decoupling condition, perturbative unitarity and vacuum stability, mass upper bounds on additional scalar bosons can be obtained at the TeV scale even at the alignment limit where the lightest Higgs boson behaves exactly like the SM Higgs boson at tree level. We then discuss phenomenological impacts of the case with the additional scalar bosons with the mass near 1 TeV. Even when they are too heavy to be directly detected at current and future experiments at hadron colliders, the large deviation in the triple Higgs boson coupling can be a signature for first-order phase transition due to quantum effects of such heavy additional Higgs bosons. On the other hand, gravitational waves from the first-order phase transition are found to be weaker in this case as compared to that with lower masses of additional scalar bosons.
