OBSERVATION OF PHI-PHI PRODUCTION IN THE REACTION (P)OVER-BAR-P-]4K(+/-) AT 1.4 GEV/C INCIDENT (P)OVER-BAR MOMENTUM

Abstract The JETSET (PS202) experiment at CERN-LEAR searches for hadronic resonances by means of in-flight antiproton-proton annihilations in the reaction p p → φφ . In order to obtain sufficient luminosity and good final-state mass resolution, this experiment uses an internal hydrogen-cluster jet target intersecting the LEAR antiproton beam. We report on the study of the reaction p p → 4K ± at 1.4 GeV / c incident p momentum, and we present the first experimental observation of a stro φφ signal in this reaction.