Medium Effects in Kaon and Antikaon Production in Nuclear Collisions at Subthreshold Beam Energies

Preprint

12 January 1999

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.nucl-ex/9901005

Abstract

Production cross sections of K$^+$ and K$^-$ mesons have been measured in C+C collisions at beam energies per nucleon below and near the nucleon-nucleon threshold. At a given beam energy, the spectral slopes of the K$^-$ mesons are significantly steeper than the ones of the K$^+$ mesons. The excitation functions for K$^+$ and K$^-$ mesons nearly coincide when correcting for the threshold energy. In contrast, the K$^+$ yield exceeds the K$^-$ yield by a factor of about 100 in proton-proton collisions at beam energies near the respective nucleon-nucleon thresholds.

Keywords

ANTIKAON PRODUCTION
NUCLEAR COLLISIONS
NUCLEON NUCLEON
MEDIUM EFFECTS
MESONS
PROTON
KAON

All Related Versions

Version 1, 1999-01-12, ArXiv
Published version: Physical Review Letters, 82 (8), 1640.

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