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 Δ(1232) production in binary reactions was found in both annihilation channels: p̄d → π- Δ+ (Δ+ → π0 p) and p̄d → π0Δ0 (Δ0 → π- p). The annihilation probabilities for these reactions turned out to be Y= (1.01 ± 0.08) × 10-5 and Y= (1.12 ± 0.20) × 10-5, respectively. In addition, the annihilation probability for the prototype Pontecorvo reaction p̄d → π- p was measured with the best world statistics: Y= (1.46 ± 0.08) × 10-5.
Lingua originale | Inglese |
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pagine (da-a) | 248-255 |
Numero di pagine | 8 |
Rivista | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 460 |
Numero di pubblicazione | 1-2 |
DOI | |
Stato di pubblicazione | Pubblicato - 1999 |
Pubblicato esternamente | Sì |