1998年2月
Observation of a He-4(Sigma) bound state in the He-4(K-, pi(-)) reaction at 600 MeV/c
PHYSICAL REVIEW LETTERS
- 巻
- 80
- 号
- 8
- 開始ページ
- 1605
- 終了ページ
- 1609
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevLett.80.1605
- 出版者・発行元
- AMERICAN PHYSICAL SOC
We have observed a clear peak below the Sigma(+)-production threshold in the He-4(K-, pi(-)) reaction at 600 MeV/c and theta(K pi) = 4 degrees. This is confirmation of the existence of the bound state of He-4(Sigma), which was reported in the He-4(stopped K-, pi(-)) reaction. As in the case of stopped kaons, no such peak was found in the He-4(K-, pi(+)) spectrum. Quantitatively reliable parameters for this level have been established. The binding energy and the width of the bound state are 4.4 +/- 0.3(stat) +/- 1(syst) MeV and 7.0 +/- 0.7(stat)(-0.0)(+1.2)(syst) MeV, respectively.
- リンク情報
- ID情報
-
- DOI : 10.1103/PhysRevLett.80.1605
- ISSN : 0031-9007
- Web of Science ID : WOS:000072117600010