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 ($) over bar pp-->pi(0) pi(0) is reported.

First Results From Obelix On Reactions With Detected Neutral Pions In the Final-state

BALESTRA, Ferruccio;BONAZZOLA, Giancarlo;BOTTA, Elena;BRESSANI, Tullio;BUSSA, Maria Pia;BUSSO, Luigi;COSTA, Sergio;FERRERO, Livio;GARFAGNINI, Raffaello;GRASSO, Antonino;MARCELLO, Simonetta;PANZIERI, Daniele;PIRAGINO, Guido;ZOSI, Gianfranco
1994-01-01

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 ($) over bar pp-->pi(0) pi(0) is reported.
1994
107
2287
2303
V. G. ABLEEV;A. ADAMO;A. ANDRIGHETTO;M. AGNELLO;F. BALESTRA;G. BELLI;G. BENDISCIOLI;A. BERTIN;P. BOCCACCIO;G. BONAZZOLA;E. BOTTA;T. BRESSANI;M. BRUSCHI;M. P. BUSSA;L. BUSSO;D. CALVO;M. CAPPONI;B. CEREDA;P. CERELLO;C. CICALO;M. CORRADINI;S. COSTA;I. DANTONE;S. DECASTRO;C. DELEO;D. Y. DENISOV;F. DISEP;A. DONZELLA;L. FAVA;A. FELICIELLO;L. FERRERO;A. FILIPPI;V. FILIPPINI;A. FONTANA;D. GALLI;R. GARFAGNINI;U. GASTALDI;B. GIACOBBE;P. GIANOTTI;A. GRASSO;C. GUARALDO;F. IAZZI;A. LAI;A. LANARO;E. L. RIZZINI;M. LOMBARDI;V. LUCHERINI;A. MAGGIORA;S. MARCELLO;U. MARCONI;G. V. MARGAGLIOTTI;G. MARON;A. MASONI;I. MASSA;B. MINETTI;P. MONTAGNA;M. MORANDO;L. MUSA;F. NICHITIU;D. PANZIERI;G. PAULI;M. PICCININI;G. PIRAGINO;M. POLI;S. N. PRAKHOV;G. PUDDU;R. A. RICCI;E. ROSSETTO;A. ROTONDI;A. M. ROZHDESTVENSKY;A. SAINO;P. SALVINI;L. SANTI;M. G. SAPOZHNIKOV;N. S. CESARI;S. SERCI;R. SPIGHI;P. TEMNIKOV;S. TESSARO;F. TOSELLO;V. I. TRETYAK;G. USAI;L. VANNUCCI;S. VECCHI;G. VEDOVATO;L. VENTURELLI;M. VILLA;A. VITALE;A. ZENONI;A. ZOCCOLI;G. ZOSI
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/107362
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