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| Home > Publications database > Search for the η mesic He 3 in the p d → d p π 0 reaction with the WASA-at-COSY facility |
| Home > Publications database > Search for the η mesic He 3 in the p d → d p π 0 reaction with the WASA-at-COSY facility |
| Journal Article | FZJ-2021-00929 |
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2020
Inst.
Woodbury, NY
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Please use a persistent id in citations: http://hdl.handle.net/2128/27107 doi:10.1103/PhysRevC.102.044322
Abstract: The excitation function for the pd→dpπ0 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 pd→(3He-η)bound→dpπ0 process. It varies between 13 nb to 24 nb for the bound state with width in the range Γ∈(5,50) MeV.
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