• 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
  • ウェブサイト
  • 食堂・売店 利用予定なし/0


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.