KEK素粒子原子核研究所理論セミナー(寺田隆広氏)

分類理論セミナー
開始2016/12/26(月)11:00
終了2016/12/26(月)12:00
会場研究本館1階会議室1
講演タイトルNon-thermal Gravitino Production after Large-Field Inflation
講演者Dr. Takahiro Terada
言語英語/English
連絡先jwhite-AT-post.kek.jp
ウェブサイト
食堂・売店利用予定なし/0

概要

Gravitino abundance is a crucially important quantity in cosmology with supersymmetry. We revisit non-thermal gravitino production after inflation in supergravity paying particular attention to inflation models with a stabilizer field, in which gravitino production by preheating has not been studied. This analysis is particularly important for Z_2 symmetric large-field models, to which perturbative analyses in the literature are not applicable. We find that the transverse gravitino abundance, which is the dominant component in the case without a stabilizer field, is much suppressed in the case with a stabilizer field. The case of the inflaton potential quartic around the minimum without the stabilizer field predicts too many gravitinos, while the cases of the quadratic potential or with a stabilizer field predicts non-thermal gravitino abundance less than the thermal contribution.

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