Generalized Dalitz Plot analysis of the near threshold pp-->ppK+K- reaction in view of the K+K- final state interaction

Abstract

The excitation function for the $pp\to pp{K}^{+}{K}^{-}$ reaction revealed a significant enhancement close to threshold which may plausibly be assigned to the influence of the $p{K}^{-}$ and $K^{+}{K}^{-}$ final state interactions. In an improved reanalysis of COSY-11 data for the $pp\to pp{K}^{+}{K}^{-}$ reaction at excess energies of Q = 10 MeV and 28 MeV including the proton-K- interaction the enhancement is confirmed. Invariant mass distributions for the two- and three-particle subsystems allow to test at low excess energies the ansatz and parameters for the description of the interaction in the ppK+K- system as derived from the COSY-ANKE data. Finally, based for the first time on the low energy K+K- invariant mass distributions and the generalized Dalitz plot analysis, we estimate the scattering length for the K+K- interaction to be |Re(a_K^+K^-)| = 0.5 + 4.0 -0.5 fm and Im(a_K^+K^-) = 3.0 +- 3.0 fm.

8 pages, 7 figures, to be published in Phys. Rev. C

References in corpus (20)

• A Unified Approach to the Classical Statistical Analysis of Small Signals
• Chiral Dynamics and the Low Energy Kaon-Nucleon Interaction
• Evidence that the a0(980) and f0(980) are not elementary particles
• A low-lying scalar meson nonet in a unitarized meson model
• Kaons in dense matter, kaon production in heavy-ion collisions, and kaon condensation in neutron stars
• Medium Effects in Kaon and Antikaon Production in Nuclear Collisions at Subthreshold Beam Energies
• Close-to-threshold Meson Production in Hadronic Interactions
• Production of K+ and of K- Mesons in Heavy-Ion Collisions from 0.6 to 2.0 AGeV Incident Energy
• First Measurement of Antikaon Phase-Space Distributions in Nucleus-Nucleus Collisions at Subthreshold Beam Energies
• Properties of the a0(980) meson
• S-wave eta'-proton FSI; phenomenological analysis of near-threshold production of pi0, eta, and eta' mesons in proton-proton collisions
• Kaon Pair Production in Proton--Proton Collisions
• Near Threshold K+K- Meson-Pair Production in Proton-Proton Collisions
• Kaon pair production close to threshold
• K${}^{-}$ Meson Production in the Proton-Proton Reaction at 3.67 GeV/c
• Coupled-channel effects in the pp -> ppK+K- reaction
• Low Energy Parameters of the KK and Pipi Scalar-Isoscalar Interactions
• Experimental results on strangeness production in proton-proton collisions at COSY
• General thoughts to the Kaon pair production in the threshold region
• COSY-11 : How will we remember it ?

Cited by in corpus (10)

• The production of K+K- pairs in proton-proton collisions at 2.83 GeV
• The production of K+K- pairs in proton-proton collisions below the phi meson 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
• Preliminary lattice study of the I=1 $K\bar{K}$ scattering length
• Study of the K+K- Interaction at COSY-11
• Theoretical studies of the reaction e+ e- --> K+ K- gamma
• Phenomenological studies of the low energy dynamics in the $pp{K}^{+}{K}^{-}$ system
• Strangeness Production in Hadron Reactions
• Meson-production experiments at COSY-Juelich