We report the study of light baryon production in two-prong annihilation reactions due to antiprotons stopping in gaseous deuterium and detected by the OBELIX spectrometer (LEAR, CERN). A clear signal of the Delta(1232) production in binary reactions was found in both annihilation channels: (p) over bar d --> pi(-)Delta(+)(Delta(+)-->pi(0)p) and (p) over bar d --> pi(0)Delta(0)(Delta(0)-->pi(-)p). The annihilation probabilities for these reactions turned out to be Y = (1.01 +/- 0.08) X 10(-5) and Y =(1.12 +/- 0.20) X 10(-5), respectively. In addition, the annihilation probability for the prototype Pontecorvo reaction (p) over bar d --> pi(-)p was measured with the best world statistics: Y = (1.46 +/- 0.08) X 10(-5).

Light baryon production in binary (p)over-bard annihilation reactions at rest

BALESTRA, Ferruccio;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;
1999-01-01

Abstract

We report the study of light baryon production in two-prong annihilation reactions due to antiprotons stopping in gaseous deuterium and detected by the OBELIX spectrometer (LEAR, CERN). A clear signal of the Delta(1232) production in binary reactions was found in both annihilation channels: (p) over bar d --> pi(-)Delta(+)(Delta(+)-->pi(0)p) and (p) over bar d --> pi(0)Delta(0)(Delta(0)-->pi(-)p). The annihilation probabilities for these reactions turned out to be Y = (1.01 +/- 0.08) X 10(-5) and Y =(1.12 +/- 0.20) X 10(-5), respectively. In addition, the annihilation probability for the prototype Pontecorvo reaction (p) over bar d --> pi(-)p was measured with the best world statistics: Y = (1.46 +/- 0.08) X 10(-5).
1999
460
248
255
13.75.-n; 14.40.Cs
O. Denisov;M. Agnello;F. Balestra;E. Botta;T. Bressani;M. P. Bussa;L. Busso;D. Calvo;P. Cerello;S. Costa;D. D'Isep;L. Fava;A. Feliciello;L. Ferrero;A. Filippi;R. Garfagnini;A. Grasso;F. Iazzi;A. Maggiora;S. Marcello;B. Minetti;N. Mirfakhraee;A. Panzarasa;D. Panzieri;G. Piragino;F. Tosello;G. Zosi;V. Alberico;A. Bertin;M. Bruschi;M. Capponi;I. D'Antone;S. D. Castro;A. Ferretti;D. Galli;B. Giacobbe;U. Marconi;M. Piccinini;M. Poli;N. S. Cesari;R. Spighi;S. Vecchi;V. Vagnoni;F. Vigotti;M. Villa;A. Vitale;A. Zoccoli;A. Bianconi;M. Corradini;E. L. Rizzini;L. Venturelli;A. Zenoni;C. Cicalo;A. Masoni;S. Mauro;G. Puddu;S. Serci;P. Temnikov;G. Usai;O. Gortchakov;S. Prakhov;A. Rozhdestvensky;M. Sapozhnikov;V. Tretyak;P. Gianotti;C. Guaraldo;A. Lanaro;V. Lucherini;F. Nichitiu;C. Petrascu;V. Ableev;C. Cavion;U. Gastaldi;M. Lombardi;G. Maron;L. Vannucci;G. Vedovato;G. Bendiscioli;V. Filippini;A. Fontana;P. Montagna;A. Rotondi;P. Salvini;G. Pauli;S. Tessaro;L. Santi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/107102
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