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arXiv · 0905.0979

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·P. Kulessa·M. Mielke·S. Mikirtychiants·M. Nekipelov·M. Papenbrock·K. Pysz·V. Serdyuk·H. Stroeher·C. Wilkin·H. Xu
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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.

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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, P. Kulessa, M. Mielke, S. Mikirtychiants, M. Nekipelov, M. Papenbrock, K. Pysz, V. Serdyuk, H. Stroeher, C. Wilkin, H. Xu. 2009-05-07. Measurement of the isospin-filtering dd -> 4He K+ K- reaction at Q=39 MeV. https://doi.org/10.1140/epja/i2009-10849-7

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