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29 March 2024
 
  » arxiv » 1302.7210

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The production of K+K- pairs in proton-proton collisions below the phi meson threshold
Q.J. Ye ; M. Hartmann ; D. Chiladze ; S. Dymov ; A. Dzyuba ; H. Gao ; R. Gebel ; V. Hejny ; A. Kacharava ; B. Lorentz ; D. Mchedlishvili ; S. Merzliakov ; M. Mielke ; S. Mikirtytchiants ; H. Ohm ; M. Papenbrock ; A. Polyanskiy ; V. Serdyuk ; H.J. Stein ; H. Stroeher ; S. Trusov ; Yu. Valdau ; C. Wilkin ; P. Wuestner ;
Date 28 Feb 2013
AbstractThe pp -> ppK+K- reaction was measured below the phi threshold at a beam energy of 2.568 GeV using the COSY-ANKE magnetic spectrometer. By assuming that the four-body phase space is distorted only by the product of two-body final state interactions, fits to a variety of one-dimensional distributions permit the evaluation of differential and total cross sections. The shapes of the distributions in the Kp and Kpp invariant masses are reproduced only if the K-p interaction is even stronger than that found at higher energy. The cusp effect in the K+K- distribution at the K0K0bar threshold is much more clear and some evidence is also found for coupling between the K-p and K0bar n channels. However, the energy dependence of the total cross section cannot be reproduced by considering only a simple product of such pair-wise final state interactions.
Source arXiv, 1302.7210
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