Topological Higgs inflation: Origin of Standard Model criticality
Topological Higgs inflation: Origin of Standard Model criticality
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DOI：
10.1103/physrevd.90.097301
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发表时间：
2014-08
影响因子：
5
通讯作者：
Yuta Hamada;Kin-ya Oda;F. Takahashi
中科院分区：
文献类型：
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作者：
Yuta Hamada;Kin-ya Oda;F. Takahashi
希格斯粒子和最高质量的测量值以及强规范耦合常数的测量值指向标准模型的接近临界状态，即在电弱和普朗克尺度上的两个真空是准生成的。我们认为，临界是由希格斯势引起的永恒拓扑暴胀的发生所必需的。这种膨胀的作用是不断地创造一个足够平坦和均匀的宇宙，为随后的缓慢膨胀提供必要的初始条件，从而产生适当大小的密度扰动。虽然在标准模型中拓扑希格斯暴胀的条件只能勉强满足，但如果引入右手中微子和/或引力的非极小耦合，就可以很容易地满足；目前未知的量子引力势修正也可能有所帮助。我们还讨论了希格斯暴胀作为观测到的密度扰动的可能起源。它的必要初始条件，即恢复的$B\ensuremath{-}L$对称性，可以通过前面的拓扑希格斯暴胀自然地实现。
The measured values of the Higgs and top masses and of the strong gauge coupling constant point to the near-criticality of the Standard Model, where two vacua at the electroweak and Planck scales are quasidegenerate. We argue that the criticality is required by the occurrence of an eternal topological inflation induced by the Higgs potential. The role of this inflation is to continuously create a sufficiently flat and homogeneous Universe, providing the necessary initial condition for the subsequent slow-roll inflation that generates the density perturbations of the right magnitude. While the condition for the topological Higgs inflation is only marginally satisfied in the Standard Model, it can be readily satisfied if one introduces the right-handed neutrinos and/or the nonminimal coupling to gravity; currently unknown quantum gravity corrections to the potential may also help. We also discuss the $B\ensuremath{-}L$ Higgs inflation as a possible origin of the observed density perturbations. Its necessary initial condition, the restored $B\ensuremath{-}L$ symmetry, can be naturally realized by the preceding topological Higgs inflation.