Antikaon Production Research Articles

The “subthreshold” production of antikaons in relativistic nuclear collisions

By use of simplified multiple collision model we calculate the inclusive differential cross section for antikaons produced in relativistic nucleus collisions at bombarding energies per nucleon below the threshold for production from free nucleon nucleon encounters. The primordial spectrum obtained is in qualitative agreement with experimental data for the reaction Si + Si at 2.1 GeV/nucleon. The inclusion of the rescattering and absorption of the antikaons significantly influences the shape of the primordial spectrum but does not substantially alter the degree of agreement with the experimental data.

Contribution of the reactionNY→NNK¯to antikaon production in relativistic heavy-ion collisions

The isospin-averaged cross section for the reaction NY..-->..NNK is calculated in the one-pion exchange model. This reaction is relevant to the production of antikaons in heavy-ion collisions at subthreshold energies. Using a simplified kinetic model in which antikaons are produced from the interaction of hyperons with the thermalized participant hadrons, it is estimated that the contribution to antikaon productions from the reaction NY..-->..NNK is only a few percent of that from the reaction ..pi..Y..-->..NK.

Energy dependence of the production of pions, kaons and antikaons calculated in the hadrochemical model

Cross sections for production of pions, kaons and antikaons in heavy ion reactions are calculated in the framework of the hadrochemical model. For the reaction Ne on NaF satisfactory agreement to the measured data is reached in a wide range of energies. The importance of consecutive hadron-hadron collisions for the mass dependence is shown.