宇宙物理セミナー ( 郡 和範准教授 )

カテゴリ宇宙物理セミナー
開始2020/06/11 (木) 12:30
終了2020/06/11 (木) 13:30
会場Online (Zoom)
講演タイトルPhotodissociation of light elements with sub-GeV massive decaying particles
講演者郡 和範准教授(KEK)
言語英語/English
連絡先関口 豊和/tsekiguc -AT- post.kek.jp
ウェブサイト
食堂・売店利用予定なし/0

概要

We consider the effects of the injections of energetic photon and electron (or positron) on the big-bang nucleosynthesis. We study the photodissociation of light elements in the early Universe those injections paying particular attention to the case that the injection energy is sub-GeV and derive upper bounds on the primordial abundances of the massive decaying particle as a function of its lifetime. We pay particular attention to the case that the injection energy is sub-GeV. We also discuss a solution of the Li7 problem in this framework.

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