The annihilation frequency of the reaction (p) over barp --> pi(0)pi(0) at rest in liquid hydrogen has been measured by the Obelix experiment by using different apparatus configurations and trigger conditions. The value obtained is f(pi(0)pi(0), LH) = (2.8 +/- 0.1(stat)+/-0.4(syst)) x 10(-4). With the same data samples, the pi(0) eta annihilation frequency has been determined to be, f(pi(0) eta, LH) = (0.9+/-0.2(stat)+/-0.1(syst)) x 10(-4). The results are discussed within the frame of the present experimental situation.

Protonium annihilation into pi^0 pi^0 at rest in a liquid hydrogen target

Bussa MP;BALESTRA, Ferruccio;FERRERO, Livio;GARFAGNINI, Raffaello;GRASSO, Antonino;PANZIERI, Daniele;BOTTA, Elena;BRESSANI, Tullio;MARCELLO, Simonetta;
2002-01-01

Abstract

The annihilation frequency of the reaction (p) over barp --> pi(0)pi(0) at rest in liquid hydrogen has been measured by the Obelix experiment by using different apparatus configurations and trigger conditions. The value obtained is f(pi(0)pi(0), LH) = (2.8 +/- 0.1(stat)+/-0.4(syst)) x 10(-4). With the same data samples, the pi(0) eta annihilation frequency has been determined to be, f(pi(0) eta, LH) = (0.9+/-0.2(stat)+/-0.1(syst)) x 10(-4). The results are discussed within the frame of the present experimental situation.
2002
65
012001
012001
S-STATE; ANTIPROTONIC-HYDROGEN; 1940 MEV/C; CAPTURE; OBELIX
Bargiotti M; Bertin A; Bruschi M; Capponi M; De Castro S; Dona R; 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; Poli M; Bonomi G; Bussa MP; Corradini M; Rizzini EL; Venturelli L; Zenoni A; Cicalo C; De Falco A; Masoni A; Puddu G; Serci S; Usai G; Gorchakov OE; Prakhov SN; Rozhdestvensky AM; Tretyak VI; Gianotti P; Guaraldo C; Lanaro A; Lucherini V; Petrascu C; Ricci RA; Filippini V; Fontana A; Montagna P; Rotondi A; Salvini P; Balestra F; Cerello P; Denisov O; Ferrero L; Garfagnini R; Grasso A; Maggiora A; Panzarasa A; Panzieri D; Tosello F; Astrua M; Botta E; Bressani T; Calvo D; Feliciello A; Filippi A; Mirfakhrai N; Marcello S; Agnello M; Iazzi F
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/2845
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