Measurement of the pbar d into phi n Pontecorvo reaction for antiproton annihilation at rest
Articolo
Data di Pubblicazione:
2002
Abstract:
he results of an investigation of the Pontecorvo reaction (p) over bard -->phin with stopped antiprotons in a gaseous deuterium target at NTP are presented. A very selective dedicated trigger was used to collect a sample of about 8.5 x 10(6) annihilations, It is found that the annihilation rate is Y((p) over bard -->phin) = (3.56 +/- 0.20(-0.1)(+0.2)) x 10(-6). Comparison with the corresponding value for the omega-meson production demonstrates a large (a factor 40) apparent violation of the OZI rule, even larger than that found in the annihilation on a free nucleon.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
MESON PRODUCTION; (P)OVER-BAR-P ANNIHILATION; OZI RULE; STRANGENESS; DEUTERIUM; NUCLEON; PROTON
Elenco autori:
Gorchakov OE; Cerello P; Ableev VG; Prakhov SN; Rozhdestvensky AM; Sapozhnikov MG; Tretyak VI; Balestra F; Busso L; Bussa MP; Denisov OY; Fava L; Ferrero L; Garfagnini R; Grasso A; Maggiora A; Maggiora M; Panzieri D; Piragino G; Tosello F; Zosi G; Bargiotti M; Bertin A; Bruschi M; De Castro S; Fabbri L; Faccioli P; Galli D; Giacobbe B; Marconi U; Massa I; Piccinini M; Cesari NS; Spighi R; Vagnoni V; Vecchi S; Villa M; Vitale A; Zoccoli A; Bianconi A; Corradini M; Donzella A; Rizzini EL; Venturelli L; Cicalo C; De Falco A; Masoni A; Puddu G; Serci S; Usai G; Gianotti P; Guaraldo C; Lanaro A; Lucherini V; Petrascu C; Filippini V; Fontana A; Montagna P; Panzarasa A; Rotondi A; Salvini P; Zenoni A; Mirfakhraee N; Astrua M; Botta E; Bressani T; Calvo D; Feliciello A; Filippi A; Marcello S; Agnello M; Iazzi F; Santi L
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