Search for the deeply bound K-pp state from the semi-inclusive forward-neutron spectrum in the in-flight K- reaction on helium-3
Search for the deeply bound K-pp state from the semi-inclusive forward-neutron spectrum in the in-flight K- reaction on helium-3
复制标题
从氦 3 飞行中 K- 反应的半包容正向中子谱中搜索深度结合的 K-pp 态
DOI：
10.1093/ptep/ptv076
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发表时间：
2015
影响因子：
3.5
通讯作者：
T. Suzuki et al.
中科院分区：
文献类型：
--
作者：
T. Hashimoto;S. Ajimura;T. Fukuda;H. Outa;T. Suzuki et al.
在J-PARC强子实验装置上，利用1gev / k介子进行了寻找束缚态的飞行反应实验。在半包涵中子失质谱中，在结合能大于80 MeV的区域没有观察到明显的峰值，在不同反应的最终态中都有碰撞结构的报道。假设状态为各向同性衰变，在95%的置信水平下，对于20、60和100 MeV的自然宽度，生产截面的质量依赖上限分别为30 - 180,70 - 250和100 - 270b/sr。
An experiment to search for thebound state was performed via the in-flightreaction usingkaons at 1 GeV/at the J-PARC hadron experimental facility. In the semi-inclusive neutron missing-mass spectrum at, no significant peak was observed in the region corresponding tobinding energy larger than 80 MeV, where a bump structure has been reported in thefinal state in different reactions. Assuming the state to be isotropically decaying into, mass-dependent upper limits on the production cross section were determined to be 30–180, 70–250, and 100–270b/sr, for the natural widths of 20, 60, and 100 MeV, respectively, at 95% confidence level.