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Analysis of the Lambda p Final State Interaction in the Reaction p+p->K^+(Lambda p)

F. Hinterberger·A. Sibirtsev
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Abstract

The missing mass spectrum measured in high resolution studies of the reaction pp -> K^+X is analyzed with respect to the strong final state interaction near the Lambda p production threshold. The observed spectrum can be described by factorizing the reaction amplitude in terms of a production amplitude and a final state scattering amplitude. Parametrizing the Lambda p final state interaction in terms of the inverse Jost function allows a direct extraction of the low-energy phase-equivalent potential parameters. Constraints on the singlet and triplet scattering lengths and effective ranges are deduced in a simultaneous fit of the Lambda p invariant mass spectrum and the total cross section data of the free Lambda p scattering using the effective range approximation.

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F. Hinterberger, A. Sibirtsev. 2004-02-26. Analysis of the Lambda p Final State Interaction in the Reaction p+p->K^+(Lambda p). https://doi.org/10.1140/epja%2Fi2003-10203-3

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