Big Bang Nucleosynthesis―“Trojan Horse Method” Approaching the “Cosmological Lithium Problem”
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- Hayakawa Seiya
- 東京学大学大院理学系研究科附属原子核科学研究センター
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- Yamaguchi Hidetoshi
- 東京学大学大院理学系研究科附属原子核科学研究センター
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- Kajino Toshitaka
- 北京航空航天大学物理学院
Bibliographic Information
- Other Title
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- ビッグバン元素合成――「トロイの木馬法」で迫る「リチウム問題」
Abstract
<p>We determined the 7Be (n, p0)7Li, 7Be (n, p1)7Li* and 7Be (n, α)4He reaction cross sections by means of the Trojan Horse method which covered the big bang nucleosynthesis (BBN) energy range. The present and the previous data were analyzed by a multi-channel R-matrix fit, providing an improved error evaluation of the (n, p0) channel and the first-ever quantification of the (n, p1) contribution. The reaction rate summing both the present (n, p0) and (n, p1) contributions imposes a new constraint on the 7Li abundance in the BBN calculation, which offers a “free 7Li reduction” to further theoretical challenges to the long-standing cosmological lithium problem.</p>
Journal
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- Butsuri
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Butsuri 77 (8), 547-552, 2022-08-05
The Physical Society of Japan
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Details 詳細情報について
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- CRID
- 1390574445219621632
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- ISSN
- 24238872
- 00290181
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- Text Lang
- ja
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- Data Source
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- JaLC
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- Abstract License Flag
- Disallowed