arXiv 1403.49712014-03-19astro-ph.COhep-phhep-th

希格斯暴胀死了吗？

Is Higgs Inflation Dead?

Jessica L. Cook, Lawrence M. Krauss, Andrew J. Long, Subir Sabharwal

备注：: 6 pages, 2 figures
发表信息：: Phys. Rev. D 89, 103525 (2014)
DOI：: 10.1103/PhysRevD.89.103525

摘要：

我们认为希格斯膨胀的地位，根据最近宣布的探测B-模式的极化的宇宙微波背景辐射的BICEP 2合作。为了使BICEP 2能够观察到原始B模式信号，暴胀的能量标度必须很高，即$V_{\rm inf} \approx 2 \times 10^{16} \GeV$。希格斯暴胀通常预言了一个小幅度的张量扰动，因此很自然地会问希格斯暴胀是否可以适应这种新的测量。我们发现答案基本上是否定的，除非考虑极端的微调，或者可能在标准模型之外添加新的场，这会删除原始想法中一些更有吸引力的特征。我们还探讨了一个以前没有明确纳入的因素可能的重要性，即在计算暴胀观测值时使用的有效势的规范依赖性，例如$n_S$和$r$，看看这是否可能提供额外的摆动空间。这种规范效应与希格斯质量不确定性和其他已经在分析中考虑的可观测量的影响相当，因此它们与约束模型有关。但是，它们太小了，无法消除BICEP 2观测和希格斯暴胀预测之间明显的不相容性。

英文摘要：

We consider the status of Higgs Inflation in light of the recently announced detection of B-modes in the polarization of the cosmic microwave background radiation by the BICEP2 collaboration. In order for the primordial B-mode signal to be observable by BICEP2, the energy scale of inflation must be high, $V_{\rm inf} \approx 2 \times 10^{16} \GeV$. Higgs Inflation generally predicts a small amplitude of tensor perturbations, and therefore it is natural to ask if Higgs Inflation might accommodate this new measurement. We find the answer is essentially no, unless one considers either extreme fine tuning, or possibly adding new beyond the standard model fields, which remove some of the more attractive features of the original idea. We also explore the possible importance of a factor that has not previously been explicitly incorporated, namely the gauge dependence of the effective potential used in calculating inflationary observables, e.g. $n_S$ and $r$, to see if this might provide additional wiggle room. Such gauge effects are comparable to effects of Higgs mass uncertainties and other observables already considered in the analysis, and therefore they are relevant for constraining models. But, they are therefore too small to remove the apparent incompatibility between the BICEP2 observation and the predictions of Higgs Inflation.

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