https://doi.org/10.1140/epja/i2009-10849-7
Regular Article - Experimental Physics
Measurement of the isospin-filtering dd 
4HeK+K- reaction at Q = 39 MeV
1
Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, PRC
2
Institut für Kernphysik and Jülich Centre for Hadron Physics, Forschungszentrum Jülich, D-52425, Jülich, Germany
3
High Energy Physics Institute, Tbilisi State University, GE-0186, Tbilisi, Georgia
4
Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, RU-141980, Dubna, Russia
5
Physikalisches Institut II, Universität Erlangen-Nürnberg, D-91058, Erlangen, Germany
6
Petersburg Nuclear Physics Institute, RU-188300, Gatchina, Russia
7
Institute for Nuclear Research, RU-117312, Moscow, Russia
8
Institute for Advanced Simulations, Forschungszentrum Jülich, D-52425, Jülich, Germany
9
Institut für Kernphysik, Universität Münster, D-48149, Münster, Germany
10
Institute of Theoretical and Experimental Physics, RU-117218, Moscow, Russia
11
H. Niewodniczański Institute of Nuclear Physics PAN, PL-31342, Kraków, Poland
12
Physics and Astronomy Department, UCL, WC1E 6BT, London, UK
* e-mail: cw@hep.ucl.ac.uk
Received:
7
May
2009
Revised:
26
June
2009
Accepted:
6
July
2009
Published online:
2
August
2009
The total cross-section for the dd
4HeK
+
K
- 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 
< 14 pb, which brings into question the viability of investigating the dd
4Hea
0(980) reaction as a means of studying isospin violation.
PACS: 14.40.Cs Other mesons with S = C = 0 , mass < 2.5 GeV – / 25.45.-z 2H -induced reactions –
© SIF, Springer-Verlag Berlin Heidelberg, 2009
