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

Tbilisi State University High Energy Physics Institute GE-0186 Tbilisi Georgia; Joint Institute for Nuclear Research Laboratory of Nuclear Problems RU-141980 Dubna Russia; Universität Erlangen-Nürnberg Physikalisches Institut II D-91058 Erlangen Germany; Institute for Advanced Simulations, Forschungszentrum Jülich D-52425 Jülich Germany
European Physical Journal A (Impact Factor: 2.42). 42(1):1-6. DOI: 10.1140/epja/i2009-10849-7
Source: arXiv

ABSTRACT The total cross-section for the dd
® \rightarrow 4HeK
- reaction has been measured at a beam momentum of 3.7GeV/c, corresponding to an excess energy of 39MeV, 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 stot \sigma_{{{\rm tot}}}^{} < 14 pb, which brings into question the viability of investigating the dd
® \rightarrow 4Hea
0(980) reaction as a means of studying isospin violation.

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