Measurement of the isospin-filtering dd -> 4He K+ K- reaction at Q=39 MeV

Abstract

The total cross section for the dd -> 4He K+ K- reaction has been measured at a beam momentum of 3.7 GeV/c, corresponding to an excess energy of 39 MeV, which is the maximum possible at the Cooler Synchrotron COSY-Jülich. A deuterium cluster-jet target and the ANKE forward magnetic spectrometer, placed inside the storage ring, have been employed in this investigation. We find a total cross section of sigma(tot) < 14 pb, which brings into question the viability of investigating the dd -> 4He a0(980) reaction as a means of studying isospin violation.

arXiv commentFive pages with three eps figures

References in corpus (14)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Resonances in $J/\psi \to \varphi {\pi }^{+}{\pi }^{-}$ and $\varphi K^{+}{K}^{-}$
• Meson production in nucleon--nucleon collisions close to the threshold
• Precision study of the eta-3He system using the d+p->3He+eta reaction
• Flatte-like distributions and the a_0(980)/f_0(980) mesons
• Observation of the Charge Symmetry Breaking d + d -> 4He + pi0 Reaction Near Threshold
• Investigation of a0-f0 mixing
• Charge Symmetry Violation in $pn\to d{\pi }^0$ as a Test of Chiral Effective Field Theory
• a0(980)-f0(980) mixing and isospin violation in the reactions pN -> d a0, pd -> 3He/3H a0 and dd -> 4He a0
• Survey of charge symmetry breaking operators for dd -> alpha pi0
• Cross Section and Tensor Analysing Power of the $\vec{d}d\to \eta \alpha$ Reaction Near Threshold
• Realistic Few-Body Physics in the $dd\to \alpha {\pi }^0$ Reaction
• Study of the $pd{\to }^3\text{He}{K}^{+}{K}^{-}$ and $pd{\to }^3\text{He}\varphi$ reactions close to threshold
• Scalar-isovector K K-bar production close to threshold

Cited by in corpus (3)

• Strangeness Production in Hadron Reactions
• Strangeness Production at COSY
• Meson-production experiments at COSY-Juelich