Low-Energy $Λ-\p$ Scattering Parameters from the $pp \to pK^+Λ$ Reaction

Details Low-Energy $Λ-\p$ Scattering Parameters from the $pp \to pK^+Λ$ Reaction Low-Energy $Λ-\p$ Scattering Parameters from the $pp \to pK^+Λ$ Reaction

1998-03-13

arxiv.org/abs/nucl-ex/9803008v1

Eur.Phys.J.A2:99-104,1998

Physics

Nuclear Physics

Nuclear Experiment

18 pages, 7 figures

Scientific paper

Constraints on the spin-averaged $\Lambda p$ scattering length and effective range have been obtained from measurements of the $pp\to pK^+\Lambda$ reaction close to the production threshold by comparing model phase-space Dalitz plot occupations with experimental ones. The data fix well the position of the virtual bound state in the $\Lambda p$ system. Combining this with information from elastic $\Lambda p$ scattering measurements at slightly higher energies, together with the fact that the hyperdeuteron is not bound, leads to a new determination of the low energy $\Lambda p$ scattering parameters.

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