Hybrid Higgs inflation: The use of disformal transformation
Hybrid Higgs inflation: The use of disformal transformation
复制标题
混合希格斯暴胀:使用不正规变换
DOI:
10.1103/physrevd.97.083512
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发表时间:
2018
影响因子:
5
通讯作者:
Maeda Kei-ichi
中科院分区:
文献类型:
--
作者:
Sato Seiga ;Maeda Kei-ichi
We propose a hybrid type of the conventional Higgs inflation and new Higgs inflation models. We perform a disformal transformation into the Einstein frame and analyze the background dynamics and the cosmological perturbations in the truncated model, in which we ignore the higher-derivative terms of the Higgs field. From the observed power spectrum of the density perturbations, we obtain the constraint on the nonminimal coupling constantand the mass parameterin the derivative coupling. Although the primordial tiltin the hybrid model barely changes, the tensor-to-scalar ratiomoves from the value in the new Higgs inflationary model to that in the conventional Higgs inflationary model asincreases. We confirm our results by numerical analysis by ADM formalism of the full theory in the Jordan frame.