Subthreshold K+ production in deuteron and alpha induced nuclear reactions

Details Subthreshold K+ production in deuteron and alpha induced nuclear reactions Subthreshold K+ production in deuteron and alpha induced nuclear reactions

1997-09-10

arxiv.org/abs/nucl-ex/9709002v1

Physics

Nuclear Physics

Nuclear Experiment

Scientific paper

Double differential cross sections have been measured for pi+ and K+ emitted around midraidity in d+A and He+A collisions at a beam kinetic energy of 1.15 GeV/nucleon. The total pi+ yield increases by a factor of about 2 when using an alpha projectile instead of a deuteron whereas the K+ yield increases by a factor of about 4. According to transport calculations, the K+ enhancement depends both on the number of hadron-hadron collisions and on the energy available in those collisions: their center-of-mass energy increases with increasing number of projectile nucleons.

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