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Search for the 4He-eta bound state in dd->(4He-eta)_(bound)->3He n pi0 and dd->(4He-eta)_(bound)->3He p pi- reactions with the WASA-at-COSY facility

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arxiv 1408.0893 v1 pith:45ZQPOHV submitted 2014-08-05 nucl-ex

Search for the 4He-eta bound state in dd->(4He-eta)_(bound)->3He n pi0 and dd->(4He-eta)_(bound)->3He p pi- reactions with the WASA-at-COSY facility

classification nucl-ex
keywords boundhe-etafacilityhighsearchstatewasa-at-cosyacceptance
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In November 2010, the search for the 4He-{\eta} bound state was per formed with high statistics and high acceptance with the WASA-at-COSY facility using a ramped beam technique. The signature of eta - mesic nuclei is searched for in the measured excitation functions for the two reaction channels: dd ->3He n pi0 and dd ->3He p pi- near the eta production threshold. This report includes the description of the experimental method and the status of the data analysis.

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