Coupled-channel effects in the pp -> ppK+K- reaction

Details Coupled-channel effects in the pp -> ppK+K- reaction Coupled-channel effects in the pp -> ppK+K- reaction

2008-07-03

arxiv.org/abs/0807.0524v1

Phys.Lett.B668:315-318,2008

Physics

Nuclear Physics

Nuclear Theory

9 pages with 4 figures

Scientific paper

10.1016/j.physletb.2008.08.062

The cross sections for the pp -> ppK+K- reaction were measured at three beam energies 2.65, 2.70, and 2.83 GeV at the COSY-ANKE facility. The shape of the K+K- spectrum at low invariant masses largely reflects the importance of K\bar{K} final state interactions. It is shown that these data can be understood in terms of an elastic K+K- rescattering plus a contribution coming from the production of a K0\bar{K}0 pair followed by a charge-exchange rescattering. Though the data are not yet sufficient to establish the size of the cusp at the K0\bar{K}0 threshold, the low mass behaviour suggests that isospin-zero production is dominant.

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