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Search for theηmesic3He in the$pd\rightarrow d p \pi^{0}$reaction with the WASA-at-COSY facility
Physical Review C ( IF 3.1 ) Pub Date : 
P. Adlarson et al.

The excitation function for the reaction has been measured by WASA-at-COSY experiment with the aim of searching for 3He-η mesic nuclei. The measurement in the vicinity of η meson production was performed using a ramped proton beam. The data analysis and interpretation was carried out with the assumption that the η-mesic Helium decays via the formation of an intermediate N*(1535) resonance. No direct signal of the η-mesic 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 the process. It varies between 13 nb to 24 nb for the bound state with width in the range .

中文翻译:

使用WASA-at-COSY工具在$ pd \ rightarrow dp \ pi ^ {0} $反应中搜索ηmesic3He

通过WASA-at-COSY实验测量了反应的激发函数,目的是寻找 3他-η中核。附近的测量η使用倾斜的质子束进行介子生产。进行数据分析和解释的前提是η氦通过中间氮的形成而衰变*(1535)共鸣。没有直接的信号η在激发功能中观察到-中子核。我们为束缚态产生和过程中的衰变确定了总横截面的新改进上限。对于结合态,其宽度在范围内,在13 nb至24 nb之间变化。
更新日期:2020-09-16
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