Near Threshold K+K- Meson-Pair Production in Proton-Proton Collisions

Abstract

The near threshold total cross section and angular distributions of K+K- pair production via the reaction pp --> ppK+K- have been studied at an excess energy of Q = 17 MeV using the COSY-11 facility at the cooler synchrotron COSY. The obtained cross section as well as an upper limit at an excess energy of Q = 3 MeV represent the first measurements on the K+K- production in the region of small excess energies where production via the channel pp --> pp Phi --> ppK+K- is energetically forbidden. The possible influence of a resonant production via intermediate scalar states f0(980) and a0(980) is discussed.

arXiv comment8 pages, 6 figures, replaced with revised version, accepted for publication in Phys. Lett. B

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Cited by in corpus (31)

• Kaon production in heavy ion reactions at intermediate energies
• Meson production in nucleon--nucleon collisions close to the threshold
• Close-to-threshold Meson Production in Hadronic Interactions
• Kaon Pair Production in Proton--Proton Collisions
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• Associated strangeness production in the pp to pK^+K^-p and pp to pK^+ pi^0 Sigma^0 reactions
• The production of K+K- pairs in proton-proton collisions at 2.83 GeV
• Measurement of the pn -> dK^+K^- total cross section close to threshold
• The production of K+K- pairs in proton-proton collisions below the phi meson threshold
• Strangeness production via resonances in heavy-ion collisions at SIS energies
• Coupled-channel effects in the pp -> ppK+K- reaction
• Contribution of the nucleon-hyperon reaction channels to K${}^{-}$ production in proton-nucleus collisions
• Drift chamber with a c-shaped frame
• Generalized Dalitz Plot analysis of the near threshold pp-->ppK+K- reaction in view of the K+K- final state interaction
• Role of the $N^{\ast }(2080)$ in $pp\to p{K}^{+}\Lambda (1520)$ and ${\pi }^{-}p\to K^0\Lambda (1520)$ reactions
• Near-threshold production of $a_0(980)$-mesons in $\pi N$ and NN collisions and $a_0/f_0$-mixing
• Upper limit for the cross section of the overlapping scalar resonances f0(980) and a0(980) produced in proton-proton collisions in the range of the reaction threshold
• Few-body aspects of the near threshold pseudoscalar meson production
• Combined analysis of the $K^{+}{K}^{-}$ interaction using near threshold $pp\to pp{K}^{+}{K}^{-}$ data
• Experimental results on strangeness production in proton-proton collisions at COSY
• Production of $a_0$-mesons in pp and pn reactions
• Associated strangeness production at threshold
• Strangeness Production in pp and pn Reactions at COSY
• Strangeness Production in Proton-Proton Collisions Close to Threshold
• Study of the K+K- Interaction at COSY-11
• Meson-production experiments at COSY-Juelich
• Phenomenological studies of the low energy dynamics in the $pp{K}^{+}{K}^{-}$ system
• Strangeness Production in Hadron Reactions
• Study of the hadronic production of kaon pairs below the threshold for the phi meson
• Near threshold production of the pseudoscalar mesons at the COSY-11 facility
• Scalar meson production in nucleon-nucleon collisions near threshold