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

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

2004-02-26

arxiv.org/abs/nucl-ex/0402021v1

Eur.Phys.J. A21 (2004) 313-321

Physics

Nuclear Physics

Nuclear Experiment

9 pages,6 figures, 2 tables

Scientific paper

10.1140/epja/i2003-10203-3

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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