Inclusive $K^+ K^-$ Production in Reactions $\pi^+ p$, $K^+ p$ and $pp$ at 200 GeV/c

Le résumé fourni par la source

PrelimiI nary results are presented f rom 4000 $\pi^+ p$ , $K^+ p$ and pp events at 200 GeV/c using the Fermi Lab Hybrid spectrometer. A study of strange particle production in the central region of 0.0 < $x_F$ < 0.3 reveals a strong correlation in rapidity between a K+ and K- produced in coincidence. The calibration and performance of CRISIS, a particle identifier which uses multiple ionization sampling in an - argon-$CO_2$ filled drift chamber, is- described in detail. As a check of its performance, two common resonances, $pp \to ^{++}_{\Delta} +X$ and $K^+ p \to K^{*0}$ (890)+X, are studied. The total cross sections obtained are 5.7 ± 1.6 mb and 5.3 ± 1.9 mb respectively. A $\phi$ signal is also observed. The results are in good agreement with the Lund Model which, although designed originally for quark jets, is expected to give reasonable results for low-$p_T$ hadron-hadron interactions. The data, however, seems to indicate a stronger short range correlation in strangeness than predicted by the model.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.