Multi-chaotic inflation with and without spectator field
Multi-chaotic inflation with and without spectator field
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有或没有观众场的多混沌膨胀
DOI:
10.1088/1475-7516/2022/07/042
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发表时间:
2022
影响因子:
6.4
通讯作者:
Yokoyama Shuichiro
中科院分区:
文献类型:
--
作者:
Morishita Yukiyoshi;Takahashi Tomo;Yokoyama Shuichiro
Motivated by the result of Planck+ BICEP/Keck recently released, we investigate the consistency of the multi-field inflation models in terms of the spectral index n s and the tensor-to-scalar ratio r. In this study, we focus on double-inflaton models with and without a spectator field. We find that inflaton with a quadratic potential can become viable when three fields with a specific hierarchical mass spectrum are realized such that two fields act as inflatons and the other one is the spectator. We also discuss the conditions to avoid the fine-tuning, by careful study of how the prediction depends on the background trajectory in the inflaton-field space.
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