First results from subthreshold K+ production measurements with ANKE
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- Nucl.Phys.A 675 (2000) 230C-233C
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Abstract: (Elsevier)
The new spectrometer ANKE has been put into operation at the accelerator COSY of the Forschungszentrum Jülich. An initial scientific goal is to study K + -production in pA collisions at subthreshold energies below the free NN-threshold of T = 1.58 GeV. First measurements of double differential cross sections in p 12 C collisions at emission angles around 0° have been performed at T = 1.0, 1.2 and 2.0 GeV. The challenge is to identify the kaons in a huge background of pions and protons, since the signal to background ratio decreases to about 10 −6 at T = 1.0 GeV. For background suppression detectors and a trigger system based on energy-loss and time-of-flight measurements have been developed. In the analysis the decay of kaons ( τ = 12.4 ns) stopped in the detection system into μ + and π + is exploited as well as the track information from the wire chambers.- talk: Beijing 1999/08/24
- p nucleus: inclusive reaction
- p nucleus: nuclear reaction
- carbon
- K+: hadroproduction
- threshold
- momentum spectrum
- magnetic spectrometer: experimental results
- Juelich COSY PS
- 1.0: 1.2: 2.0 GeV
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