2006/02/15 by P. Winter, M. Wolke, H. -H. Adam +27 · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1016/j.physletb.2006.02.037
published as Phys.Lett.B635:23-29,2006 · accepted for publication in Phys. Lett. B
arxiv created 2006/02/15 · openalex publication_date 2006/02/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/02
The total cross section of the reaction pp→ppK+K− has been measured at excess energies Q=10MeV and 28 MeV with the magnetic spectrometer COSY-11. The new data show a significant enhancement of the total cross section compared to pure phase space expectations or calculations within a one boson exchange model. In addition, we present invariant mass spectra of two particle subsystems. While the K+K− system is rather constant for different invariant masses, there is an enhancement in the pK− system towards lower masses which could at least be partially connected to the influence of the Λ(1405) resonance.