Lifetime Measurement of 12ΛC, 28ΛSi, and ΛFe Hypernuclei

H. Bhang, S. Ajimura, K. Aoki, T. Hasegawa, O. Hashimoto, H. Hotchi, Y. D. Kim, T. Kishimoto, K. Maeda, H. Noumi, Y. Ohta, K. Omata, H. Outa, H. Park, Y. Sato, M. Sekimoto, T. Takahashi, T. Takahashi, M. Youn

研究成果: Article査読

77 被引用数 (Scopus)

抄録

We have measured lifetimes of Λ hypernuclei over a broad mass range explicitly identifying Λ hypernuclear production in the \(π+, K+\) reaction. The obtained results are τ\(12ΛC\) = 231+/-15 ps, τ\(28ΛSi\) = 206+/-12 ps, and τ\(ΛFe\) = 215+/-14 ps. The lifetimes of Λ hypernuclei over the mass region from carbon to iron are found almost constant at about 80% of that of free Λ within the statistical uncertainties. The short-range nature of the nonmesonic weak decay process, which is dominant in heavy Λ hypernuclei, is possibly responsible for the observed weak hypernuclear mass dependence.

本文言語English
ページ(範囲)4321-4324
ページ数4
ジャーナルPhysical review letters
81
20
DOI
出版ステータスPublished - 1998 11月 16
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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