Subthreshold K+ production in deuteron and alpha induced nuclear reactions

M. Debowski; P. Senger; M. Boivin; Y. LeBornec; P. Courtat; R. Gacougnolle; E. Grosse; S. Kabana; T. Kirchner; P. Koczon; M. Mang; E. Schwab; B. Tatischeff; A. Wagner; W. Walus; N. Willis; G. Wolf; R. Wurzinger; J. Yonnet

arXiv · nucl-ex/9709002

Subthreshold K+ production in deuteron and alpha induced nuclear reactions

M. Debowski·P. Senger·M. Boivin·Y. LeBornec·P. Courtat·R. Gacougnolle·E. Grosse·S. Kabana·T. Kirchner·P. Koczon·M. Mang·E. Schwab·B. Tatischeff·A. Wagner·W. Walus·N. Willis·G. Wolf·R. Wurzinger·J. Yonnet

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Abstract

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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M. Debowski, P. Senger, M. Boivin, Y. LeBornec, P. Courtat, R. Gacougnolle, E. Grosse, S. Kabana, T. Kirchner, P. Koczon, M. Mang, E. Schwab, B. Tatischeff, A. Wagner, W. Walus, N. Willis, G. Wolf, R. Wurzinger, J. Yonnet. 1997-09-10. Subthreshold K+ production in deuteron and alpha induced nuclear reactions. https://arxiv.org/abs/nucl-ex/9709002

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