Two-nucleon induced Λ decay in nuclei

The pionic channel of Λ decay in nuclei is forbidden by the Pauli principle. We discuss the decay in another state, the pion branch, a collective state which is a coherent nuclear stperposition of pionic and Δ-h state and which lies at an energy lower than the physical pion. Its decay mode in the re...

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Bibliographic Details
Published in:Physics letters. B 1991, Vol.256 (2), p.134-140
Main Authors: Alberico, W.M., De Pace, A., Ericson, M., Molinari, A.
Format: Article
Language:English
Subjects:
Nuclear Theory
Physics
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Summary:The pionic channel of Λ decay in nuclei is forbidden by the Pauli principle. We discuss the decay in another state, the pion branch, a collective state which is a coherent nuclear stperposition of pionic and Δ-h state and which lies at an energy lower than the physical pion. Its decay mode in the region concerned here is by two-particle emission. The Λ decay process is then a two-nucleon induced one: Λ+ p+ n→ p+ n+ n. We find a sizeable branching ratio.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(91)90663-B