Medium effects in kaon and anti-kaon production in nuclear collisions at subthreshold beam energies

The KaoS collaboration Laue, F. ; Sturm, Christian Thomas ; Bottcher, I. ; et al.
Phys.Rev.Lett. 82 (1999) 1640-1643, 1999.
Inspire Record 493975 DOI 10.17182/hepdata.31244

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.

0 data tables match query