KEK素粒子原子核研究所・理論セミナー/石渡

分類理論セミナー
開始2015/10/06(火)11:00
終了2015/10/06(火)12:00
会場研究本館1階 会議室1
講演タイトルGrand Unification and Subcritical Hybrid Inflation
講演者石渡 弘治氏 (金沢大学)
言語英語/English
連絡先山本恵/yamakei-AT-post.kek.jp
ウェブサイト
食堂・売店利用予定なし/0

概要


    (ABSTRACT)

We consider hybrid inflation for small couplings of the inflaton to matter such that the critical value of the inflaton field exceeds the Planck mass. It has recently been shown that inflation then continues at subcritical inflaton field values where quantum fluctuations generate an effective inflaton mass. The effective inflaton potential interpolates between a quadratic potential at small field values and a plateau at large field values. An analysis of the allowed parameter space leads to predictions for the scalar spectral index n_s and the tensor-to-scalar ratio r similar to those of natural inflation. Using the ranges for n_s and r favored by the Planck data, we find that the energy scale of the plateau is constrained to the interval (1.6 − 2.4) × 10^16 GeV, which includes the energy scale of gauge coupling unification in the supersymmetric standard model. The tensor-to-scalar ratio is predicted to satisfy the lower bound r > 0.049 for 60 e-folds before the end of inflation.

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