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26 April 2024

» arxiv » 1202.5451

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The production of K+K- pairs in proton-proton collisions at 2.83 GeV
Q.J. Ye ; M. Hartmann ; Y. Maeda ; S. Barsov ; M. Buescher ; D. Chiladze ; S. Dymov ; A. Dzyuba ; H. Gao ; R. Gebel ; V. Hejny ; A. Kacharava ; I. Keshelashvili ; Yu. T. Kiselev ; A. Khoukaz ; V. P. Koptev ; P. Kulessa ; A. Kulikov ; B. Lorentz ; T. Mersmann ; S. Merzliakov ; S. Mikirtytchiants ; M. Nekipelov ; H. Ohm ; E. Ya. Paryev ; A. Polyanskiy ; V. Serdyuk ; H. J. Stein ; H. Stroeher ; S. Trusov ; Yu. Valdau ; C. Wilkin ; P. Wuestner ;
Date:	24 Feb 2012
Abstract:	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.
Source:	arXiv, 1202.5451
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