Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
Department of Physics, Osaka University, Osaka 560-0043, Japan.
Phys Rev Lett. 2014 Jun 20;112(24):241301. doi: 10.1103/PhysRevLett.112.241301. Epub 2014 Jun 16.
The observed value of the Higgs boson mass indicates that the Higgs potential becomes small and flat at the scale around 10(17) GeV. Having this fact in mind, we reconsider the Higgs inflation scenario proposed by Bezrukov and Shaposhnikov. It turns out that the nonminimal coupling ξ of the Higgs squared to the Ricci scalar can be smaller than 10. For example, ξ=7 corresponds to the tensor-to-scalar ratio r≃0.2, which is consistent with the recent observation by BICEP2.
观测到的希格斯玻色子质量表明，希格斯势在约 10(17)GeV 的尺度下变得很小且平坦。考虑到这一事实，我们重新考虑了 Bezrukov 和 Shaposhnikov 提出的希格斯暴涨场景。结果表明，希格斯平方与 Ricci 标量的非最小耦合 ξ 可以小于 10。例如，ξ=7 对应于张量-标量比 r≃0.2，这与 BICEP2 的最近观测结果一致。
