Subthreshold K+ production in deuteron and alpha induced nuclear reactions

M. Dȩbowski, P. Senger, M. Boivin, Y. Le Bornec, P. Courtat, R. Gacougnolle, E. Grosse, S. Kabana, T. Kirchner, P. Koczoń, M. Mang, E. Schwab, B. Tatischeff, A. Wagner, W. Waluś, N. Willis, G. Wolf, R. Wurzinger, J. Yonnet

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Abstract

Double differential cross sections d2σ/dpdΩ have been measured for π+ and K+ emitted around midrapidity in d + A and α + A collisions at a beam kinetic energy of 1.15 GeV/nucleon. The total π+ 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.

Original languageEnglish
Pages (from-to)8-14
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume413
Issue number1-2
Publication statusPublished - Nov 6 1997

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Dȩbowski, M., Senger, P., Boivin, M., Le Bornec, Y., Courtat, P., Gacougnolle, R., Grosse, E., Kabana, S., Kirchner, T., Koczoń, P., Mang, M., Schwab, E., Tatischeff, B., Wagner, A., Waluś, W., Willis, N., Wolf, G., Wurzinger, R., & Yonnet, J. (1997). Subthreshold K+ production in deuteron and alpha induced nuclear reactions. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 413(1-2), 8-14.