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Forward K+ production in subthreshold pA collisions at 1.0 GeV

V. Koptev·M. Buescher·the ANKE collaboration
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Abstract

K+ meson production in pA (A = C, Cu, Au) collisions has been studied using the ANKE spectrometer at an internal target position of the COSY-Juelich accelerator. The complete momentum spectrum of kaons emitted at forward angles, theta < 12 degrees, has been measured for a beam energy of T(p)=1.0 GeV, far below the free NN threshold of 1.58 GeV. The spectrum does not follow a thermal distribution at low kaon momenta and the larger momenta reflect a high degree of collectivity in the target nucleus.

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V. Koptev, M. Buescher, the ANKE collaboration. 2001-05-16. Forward K+ production in subthreshold pA collisions at 1.0 GeV. https://doi.org/10.1103/physrevlett.87.022301

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