Measurement of K^*(892)^0 and K^0 mesons in Al_s16Al collisions at 1.9$A$ GeV
Lopez, X. and others (FOPI Coll.)
Keywords
strangeness, heavy ion collisions, FOPI
Abstract
New measurement of sub-threshold $K^*(892)^0$ and $K^0$ production is presented. The experimental data complete the measurement of strange particles produced in Al_s16Al collisions at 1.9$A$ GeV measured with the FOPI detector at SIS/GSI. The $K^*(892)^0$ / $K^0$ yield ratio is found to be $0.0315pm 0.006 (mathrm{stat.})pm 0.012 (mathrm{syst.})$ and is in good agreement with the UrQMD model prediction. These measurements provide information on in-medium cross section of $K^_s16$ - $pi^-$ fusion which is the dominant process on sub-threshold $K^*(892)^0$ production.
