First results from OBELIX on reactions with detected neutral poins in the final state

We describe some results obtained by the OBELIX experiment at LEAR by exploiting the whole spectrometer, including the electromagnetic calorimeter, to study the antiproton-proton annihilation at rest in an NTP hydrogen target. In particular, we give some information on the calibration of the calorimeter, as obtained from the analysis of two-prong events, and we describe the status of the analysis of the first sample of \uaball neutrals\ubb events collected in gaseous hydrogen. A preliminary result on the branching ratio of the annihilation reaction p\u2c9p\u2192\u3c00\u3c00 is reported

Study of the OZI-rule violation in antiproton annihilation in deuterium at rest

The branching ratios of \u3a6\u3c0 12 and \u3c9\u3c0 12 final states were measured for the antiproton annihilation in gaseous deuterium at rest. A significant violation of the OZI rule was found