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Production of a neutron-rich H-6Λ hypernucleus in the Li-6(π-, K+) reaction

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タイトル: Production of a neutron-rich H-6Λ hypernucleus in the Li-6(π-, K+) reaction
著者: Harada, Toru 著作を一覧する
Hirabayashi, Yoshiharu 著作を一覧する
発行日: 2017年 4月19日
出版者: American Physical Society (APS)
誌名: Physical review C
巻: 95
号: 4
開始ページ: 44610
出版社 DOI: 10.1103/PhysRevC.95.044610
抄録: We study phenomenologically the production of the neutron-rich hypernucleus H-6Λ in the Li-6(π-, K+) reaction at 1.2 GeV/c, using a distorted-wave impulse approximation in a one-step mechanism, π- p → K+ Σ- via Σ- doorways caused by Σ- p ⇔ Λn coupling. The production cross section of H-6Λ(1 exc.+) is evaluated by a coupled (H-5- Λ) + (He-5-Σ-) model with a spreading potential, in comparison with the data of the missing mass spectrum at the J-PARC E10 experiment. The result indicates that the Σ- mixing probabilities in H-6Λ(1 exc.+) are PΣ-< ~ 0.2% both for sΣ state and for pΣ state in order to reproduce no significant peak in the Λ production data, so that the cross section of H-6Λ is less than on the order of 0.4 nb/sr. The sensitivity of the Σ Λ coupling and Λ potentials to the near-Λ-threshold spectrum is discussed. The shape and magnitude of the spectrum provide valuable information on the Σ Λ coupling in the production mechanism and also the nuclear structure of H-6Λ(1 exc.+).
Rights: ©2017 American Physical Society
資料タイプ: article
URI: http://hdl.handle.net/2115/66176
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 平林 義治

 

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