Critical Higgs inflation in a viable motivated model
Critical Higgs inflation in a viable motivated model
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可行的激励模型中的临界希格斯暴涨
DOI：
10.1103/physrevd.99.015037
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发表时间：
2018
影响因子：
5
通讯作者：
A. Salvio
中科院分区：
文献类型：
--
作者：
A. Salvio
标准模型的扩展包含三个右手中微子和一个简单的不可见轴子模型，除了解决强CP问题、稳定电弱真空和满足所有当前观测边界之外，还可以解释所有实验证实的新物理信号（中微子振荡、暗物质和重子不对称性）。我们表明，该模型也可以实现临界希格斯膨胀，这对应于之间的边界稳定性和亚稳性的电弱真空。这导致希格斯粒子和里奇标量之间的非最小耦合的值比通常在远离临界的希格斯膨胀中引用的值要低得多。这样一来，一个优点就是在平坦时空中微扰么正性破缺的尺度可以非常接近普朗克质量，在任何情况下都需要新的物理学。在这个暴胀的设置中，高维算子是在控制之下的。当把希格斯粒子与暴胀子联系起来时，也适当地考虑了截止对希格斯粒子背景的依赖性。此外，临界希格斯暴胀具有强大的暴胀吸引子，使其成为早期宇宙的一个有吸引力的设置。与标准模型不同，在所提出的模型中，临界希格斯暴胀可以在与观察到的量（例如顶部质量和强耦合）没有任何张力的情况下实现。
An extension of the Standard Model with three right-handed neutrinos and a simple invisible axion model can account for all experimentally confirmed signals of new physics (neutrino oscillations, dark matter, and baryon asymmetry) in addition to solving the strong CP problem, stabilizing the electroweak vacuum, and satisfying all current observational bounds. We show that this model can also implement critical Higgs inflation, which corresponds to the frontier between stability and metastability of the electroweak vacuum. This leads to a value of the nonminimal coupling between the Higgs and the Ricci scalar that is much lower than the one usually quoted in Higgs inflation away from criticality. Then, an advantage is that the scale of perturbative unitarity breaking on flat spacetime can be very close to the Planck mass, where in any case new physics is required. The higher dimensional operators are under control in this inflationary setup. The dependence of the cutoff on the Higgs background is also taken into account as appropriate when the Higgs is identified with the inflaton. Furthermore, critical Higgs inflation enjoys a robust inflationary attractor that makes it an appealing setup for the early universe. In the proposed model, unlike in the Standard Model, critical Higgs inflation can be realized without any tension with the observed quantities, such as the top mass and the strong coupling.
具有准边生成最小值的 KSVZ 轴子模型：暗物质和暗能量的统一模型
影响因子：
5
作者：
Lloyd-Stubbs A
通讯作者：
Lloyd-Stubbs A