ournal of C osmology and A stroparticle P hysics Postinflationary vacuum instability and Higgs-inflaton couplings
ournal of C osmology and A stroparticle P hysics Postinflationary vacuum instability and Higgs-inflaton couplings
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宇宙学和星体粒子物理学期刊暴胀后真空不稳定性和希格斯暴胀耦合
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通讯作者：
T. Hashida
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作者：
Yuji Nakane;Kazushi Sato;Hideaki Takahashi;N. Yamasaki;T. Hashida
。希格斯-暴胀耦合在早期宇宙的希格斯场动力学中发挥着重要作用。即使在环路级产生的微小耦合也会对弱电真空的命运产生巨大影响。在现实的再加热模型中，这种希格斯-暴胀子相互作用同时存在于三线性和四次水平上。在这项工作中，我们研究了预热时期的希格斯动力学，重点关注参数和快子共振的影响。我们在研究中使用晶格模拟和其他数值工具。我们发现共振会引起希格斯场的大幅波动，从而破坏电弱真空的稳定性。因此，我们的考虑提供了希格斯粒子和暴胀子之间四次和三线性相互作用的上限。我们得出的结论是，存在一个有利的耦合范围，在该范围内希格斯场在暴胀期和预热期都稳定。
. The Higgs-inflaton coupling plays an important role in the Higgs field dynamics in the early Universe. Even a tiny coupling generated at loop level can have a dramatic effect on the fate of the electroweak vacuum. Such Higgs-inflaton interaction is present both at the trilinear and quartic levels in realistic reheating models. In this work, we examine the Higgs dynamics during the preheating epoch, focusing on the effects of the parametric and tachyonic resonances. We use lattice simulations and other numerical tools in our studies. We find that the resonances can induce large fluctuations of the Higgs field which destabilize the electroweak vacuum. Our considerations thus provide an upper bound on quartic and trilinear interactions between the Higgs and the inflaton. We conclude that there exists a favorable range of the couplings within which the Higgs field is stabilized during both inflation and preheating epochs.