Combined analysis of the $K^{+}{K}^{-}$ interaction using near threshold $pp\to pp{K}^{+}{K}^{-}$ data

Abstract

The $K^{+}{K}^{-}$ final state interaction was investigated based on both the $K^{+}{K}^{-}$ invariant mass distributions measured at excess energies of Q = 10 and 28 MeV and the near threshold excitation function for the $pp\to pp{K}^{+}{K}^{-}$ reaction. The $K^{+}{K}^{-}$ final state enhancement factor was parametrized using the effective range expansion. The effective range of the $K^{+}{K}^{-}$ interaction was estimated to be: $\mathrm{Re}(b_{K^{+}{K}^{-}})=-0.1\pm 0.4_{stat}\pm 0.3_{sys}\mathrm{fm}$ and $\mathrm{Im}(b_{K^{+}{K}^{-}})=1.2_{-0.2_{stat}-0.0_{sys}}^{+0.1_{stat}+0.2_{sys}}\mathrm{fm}$, and the determined real and imaginary parts of the $K^{+}{K}^{-}$ scattering length amount to: $|\mathrm{Re}(a_{K^{+}{K}^{-}})|=8.0_{-4.0_{stat}}^{+6.0_{stat}}\mathrm{fm}$ and $\mathrm{Im}(a_{K^{+}{K}^{-}})=0.0_{-5.0_{stat}}^{+20.0_{stat}}\mathrm{fm}$.

5 pages, 3 figures, article accepted for publication in Phys. Rev. C

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• K^- p scattering length from scattering experiments
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• Kaon Pair Production in Proton--Proton Collisions
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Cited by in corpus (4)

• Few-body aspects of the near threshold pseudoscalar meson production
• Theoretical studies of the reaction e+ e- --> K+ K- gamma
• Strong interaction between kaons in the reactions e+ e- --> K+ K- gamma and e+ e- --> K0 K0bar gamma
• Phenomenological studies of the low energy dynamics in the $pp{K}^{+}{K}^{-}$ system