Search for the ? mesic He 3 in the p d ? d p p 0 reaction with the WASA-at-COSY facility
Search for the ? mesic He 3 in the p d ? d p p 0 reaction with the WASA-at-COSY facility
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DOI：
10.1103/physrevc.102.044322
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发表时间：
2020
影响因子：
3.1
通讯作者：
Adlarson P
中科院分区：
文献类型：
--
作者：
Adlarson P
本文用WASA-at-COSY实验测量了反应的激发函数，目的是寻找甲酸核。介子产生附近的测量是用斜变质子束进行的。数据的分析和解释是在假设氦通过中间（1535）共振的形成而衰变的情况下进行的。在兴奋函数中未观察到中核的直接信号。我们确定了一个新的改进的上限的总截面的束缚态的产生和衰变的过程。对于宽度在MeV范围内的束缚态，它在13 nb到24 nb之间变化。
The excitation function for thereaction has been measured by WASA-at-COSY experiment with the aim of searching formesic nuclei. The measurement in the vicinity ofmeson production was performed using a ramped proton beam. The data analysis and interpretation was carried out with the assumption that themesic helium decays via the formation of an intermediate(1535) resonance. No direct signal of themesic nucleus is observed in the excitation function. We determine a new improved upper limit for the total cross section for the bound state production and decay in theprocess. It varies between 13 nb to 24 nb for the bound state with width in the rangeMeV.