Abstract.
The experimental programme of the CELSIUS/WASA Collaboration at the CELSIUS cooler/storage ring of the The Svedberg Laboratory, Uppsala, focuses on meson production and decay studies using light-ion collisions near threshold. The production of \(\eta\)-mesons has been studied in pp and pd collisions and \(2\pi\) reactions have been studied in pp collisions, using the PROMICE/WASA detector. Both total and differential cross-sections have been investigated and some of the reaction channels have been measured for the first time in any detail. The data on \(\eta\) production reveal effects which can be attributed to a strong and attractive \(\eta\)-N interaction. Both the \(\eta\) and two-pion production data contain new information on the importance of different nucleon resonances in these reactions. The PROMICE/WASA detector is now an integrated part of the recently commissioned WASA detector at CELSIUS, which has a nearly \(4\pi\) acceptance for both charged particles and photons. This will provide significantly improved conditions for a new generation of experiments on meson production and decays.
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Received: 30 September 2002, Published online: 22 October 2003
PACS:
13.75.-n Hadron-induced low- and intermediate-energy reactions and scattering (energy \(\leq 10\) GeV) - 14.20.Gk Baryon resonances with S = 0 - 25.40.Ve Other reactions above meson production thresholds (energies > 400 MeV)
T. Johansson: Representing the CELSIUS/WASA Collaboration: (www.tsl.uu.se/wasa)
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Johansson, T. Meson production at CELSIUS. Eur. Phys. J. A 18, 277–281 (2003). https://doi.org/10.1140/epja/i2002-10216-4
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DOI: https://doi.org/10.1140/epja/i2002-10216-4