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

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). (C) 1999 Published by Elsevier Science B.V. All rights reserved. RI Galli, Domenico/A-1606-2012; Iazzi, Felice/F-4490-2012; Botta, Elena/G-9742-2012; Villa, Mauro/C-9883-2009; Fontana, Andrea/I-4375-2012; Filippi, Alessandra/I-9530-2012