Decay rate of electroweak vacuum in the standard model and beyond
Decay rate of electroweak vacuum in the standard model and beyond
复制标题
DOI：
10.1103/physrevd.97.116012
复制
发表时间：
2018-03
影响因子：
5
通讯作者：
So Chigusa;T. Moroi;Y. Shoji
中科院分区：
文献类型：
--
作者：
So Chigusa;T. Moroi;Y. Shoji
我们对标准模型以及标准模型以外的模型中的电弱真空衰减率进行了精确计算。我们使用最近发展的技术来计算假真空的衰变率，它提供了一个规范不变的衰变率在单圈水平的计算。我们给出了一个处方，以考虑与平移，双折射和规范对称性的零模式。我们计算每单位体积的衰变率，$\gamma$，通过使用一个解析公式。在标准模型中，电弱真空的衰变率估计为$10} gamma\times{\rmGyr ~ Gpc ^3} =-582 ^{+40~+184~+144~+2}_{-45~-329~-218~-1}$，其中第一、第二、第三和第四误差是由于Higgs质量、顶夸克质量、强耦合常数和重整化尺度的选择。本文给出的衰变率解析公式及其拟合公式同样适用于高能尺度下具有经典标度不变性的模型。作为一个例子，我们考虑耦合到标准模型希格斯玻色子的额外费米子，并讨论它们对电弱真空衰变率的影响。
We perform a precise calculation of the decay rate of the electroweak vacuum in the standard model as well as in models beyond the standard model. We use a recently-developed technique to calculate the decay rate of a false vacuum, which provides a gauge invariant calculation of the decay rate at the one-loop level. We give a prescription to take into account the zero modes in association with translational, dilatational, and gauge symmetries. We calculate the decay rate per unit volume, $\gamma$, by using an analytic formula. The decay rate of the electroweak vacuum in the standard model is estimated to be $\log_{10}\gamma\times{\rm Gyr~Gpc^3} = -582^{+40~+184~+144~+2}_{-45~-329~-218~-1}$, where the 1st, 2nd, 3rd, and 4th errors are due to the uncertainties of the Higgs mass, the top quark mass, the strong coupling constant and the choice of the renormalization scale, respectively. The analytic formula of the decay rate, as well as its fitting formula given in this paper, is also applicable to models that exhibit a classical scale invariance at a high energy scale. As an example, we consider extra fermions that couple to the standard model Higgs boson, and discuss their effects on the decay rate of the electroweak vacuum.