Higgs scalaron mixed inflation
Higgs scalaron mixed inflation
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DOI：
10.1016/j.physletb.2017.04.060
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发表时间：
2017-01
影响因子：
4.4
通讯作者：
Yohei Ema
中科院分区：
文献类型：
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作者：
Yohei Ema
我们讨论了具有Higgs和Ricci标量之间的非最小耦合以及Ricci标量平方项的系统的膨胀动力学。在这个系统中有两个标量模，即引力子的希格斯模和自旋零模。研究了膨胀过程中希格斯粒子和标量粒子的双场动力学，阐明了膨胀由希格斯粒子和标量粒子主导的条件。我们还发现，真空附近的截止标度和普朗克标度一样大，因此不存在唯一性问题，尽管真空附近理论的微扰性对耦合有限制。
We discuss the inflationary dynamics of a system with a non-minimal coupling between the Higgs and the Ricci scalar as well as a Ricci scalar squared term. There are two scalar modes in this system,i.e.the Higgs and the spin-zero mode of the graviton, or the scalaron. We study the two-field dynamics of the Higgs and the scalaron during inflation, and clarify the condition where inflation is dominated by the Higgs/scalaron. We also find that the cut-off scale at around the vacuum is as large as the Planck scale, and hence there is no unitarity issue, although there is a constraint on the couplings from the perturbativity of the theory at around the vacuum.