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

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

2009-05-07

arxiv.org/abs/0905.0979v1

Eur.Phys.J.A42:1-6,2009

Physics

Nuclear Physics

Nuclear Experiment

Five pages with three eps figures

Scientific paper

10.1140/epja/i2009-10849-7

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-J\"{u}lich. 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.

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