2008/07/03 by A. Dzyuba, M. Büscher, M. Buescher +9
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-ex #nucl-th
paper · pdf · doi:10.1016/j.physletb.2008.08.062
published as Phys.Lett.B668:315-318,2008 · 9 pages with 4 figures
arxiv created 2008/07/03 · openalex publication_date 2008/09/04 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
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 KK¯ 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 K0K¯0 pair followed by a charge-exchange rescattering. Though the data are not yet sufficient to establish the size of the cusp at the K0K¯0 threshold, the low mass behaviour suggests that isospin-zero production is dominant.