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Production of a neutron-rich H-6Λ hypernucleus in the Li-6(π-, K+) reaction
| Title: | Production of a neutron-rich H-6Λ hypernucleus in the Li-6(π-, K+) reaction |
| Authors: | Harada, Toru Browse this author →KAKEN DB | | Hirabayashi, Yoshiharu Browse this author →KAKEN DB |
| Issue Date: | 19-Apr-2017 |
| Publisher: | American Physical Society (APS) |
| Journal Title: | Physical review C |
| Volume: | 95 |
| Issue: | 4 |
| Start Page: | 44610 |
| Publisher DOI: | 10.1103/PhysRevC.95.044610 |
| Abstract: | 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 |
| Type: | article |
| URI: | http://hdl.handle.net/2115/66176 |
| Appears in Collections: | 情報基盤センター (Information Initiative Center) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 平林 義治
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