arXiv:0905.0979·v1·Nuclear Experiment
Measurement of the isospin-filtering dd -> 4He K+ K- reaction at Q=39 MeV
X.Yuan🇨🇳 · M.Buescher🇩🇪 · D.Chiladze🇩🇪 · S.Dymov🇷🇺 · A.Dzyuba🇩🇪 · V.Yu.Grishina🇷🇺 · C.Hanhart🇩🇪 · M.Hartmann🇩🇪 · A.Kacharava🇩🇪 · A.Khoukaz🇩🇪 · L.A.Kondratyuk🇷🇺 · V.Koptev🇷🇺
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.
Comments: Five pages with three eps figures