KEK素粒子原子核研究所・理論セミナー（Prof. Misao Sasaki）

 
カテゴリ理論セミナー
開始2018/04/19（木）15:30
終了2018/04/19（木）16:30
会場研究本館１階　会議室１
講演タイトルScalaron as a Heavy Field and Formation of Primordial Black Holes
講演者Prof. Misao Sasaki (Kavli IPMU, The University of Tokyo)
言語英語/English
連絡先teradat-AT-post.kek.jp
ウェブサイト
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概要

（ABSTRACT） We propose a model of two-stage inflation in which a scalar field, χχ, is non-minimally coupled to Starobinsky’s R2R2gravity. The scalaron, ϕϕ, in Starobinsky’ model drives the first stage of inflation, and χχ drives the second. At the end of the first stage, the scalaron becomes heavy and undergoes damped oscillations. This causes enhancement and oscillatory features in the curvature perturbation power spectrum. The peak in these features may give rise to copious production of primordial black holes (PBHs). For a suitably chosen set of model parameters, these PBHs may even dominate the CDM of the Universe.

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