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

2009/05/07 by X. Yuan, M. Büscher, M. Buescher +22 · 8 citations
Physics and Astronomy · #Atomic physics #Beam (structure) #Cross section (physics) #Deuterium #Isospin #Jet (fluid) #Momentum (technical analysis) #Nuclear physics #Nuclear physics research studies #Optics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Resolution (logic) #Spectrometer #Storage ring #Synchrotron #nucl-ex #nucl-th

paper · pdf · doi:10.1140/epja/i2009-10849-7

published in The European Physical Journal A 42(1) (Springer Science+Business Media) · Five pages with three eps figures

arxiv created 2009/05/07 · openalex publication_date 2009/08/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

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.

Citations

• Review of Particle Physics
• Realistic few-body physics in the dd→απ0 reaction
• Scalar-isovector K¯ production close to threshold
• Investigation ofa0–f0mixing
• Meson production in nucleon?nucleon collisions close to the threshold
• Observation of the Charge Symmetry Breakingd+d→He<mml:mprescripts/><mml:none/>4+π0Reaction Near Threshold
• Flatté-like distributions and the a0(980)/f0(980) mesons
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)