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 «all neutrals» events collected in gaseous hydrogen. A preliminary result on the branching ratio of the annihilation reaction pˉp→π0π0 is reported.

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

MARGAGLIOTTI, GIACOMO;TESSARO, SUSANNA;
1994

Abstract

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 «all neutrals» events collected in gaseous hydrogen. A preliminary result on the branching ratio of the annihilation reaction pˉp→π0π0 is reported.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11368/2719393
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