The production of K+K- pairs in proton-proton collisions at 2.83 GeV

Details The production of K+K- pairs in proton-proton collisions at 2.83 GeV The production of K+K- pairs in proton-proton collisions at 2.83 GeV

2012-02-24

arxiv.org/abs/1202.5451v1

Physics

Nuclear Physics

Nuclear Experiment

12 pages, 12 figures, 3 tables

Scientific paper

Differential and total cross sections for the pp -> ppK+K- reaction have been measured at a proton beam energy of 2.83 GeV using the COSY-ANKE magnetic spectrometer. Detailed model descriptions fitted to a variety of one-dimensional distributions permit the separation of the pp -> pp phi cross section from that of non-phi production. The differential spectra show that higher partial waves represent the majority of the pp -> pp phi total cross section at an excess energy of 76 MeV, whose energy dependence would then seem to require some s-wave phi-p enhancement near threshold. The non-phi data can be described in terms of the combined effects of two-body final state interactions using the same effective scattering parameters determined from lower energy data.

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