The results of a search for a possible evidence of a pi (+)pi (+) resonant state in the (n) over barp --> pi (+)pi (+)pi (-) annihilation reaction with data collected by the OBELIX Experiment are presented. The study has been performed by means of a partial wave analysis in the frame of the isobar model. Production fractions for a possible pi (+)pi (+) resonance have been evaluated. The observed effects at the pi (+)pi (+) threshold may be described reasonably well by the contributions of f(2)(1270), f(0)(1500), f(2)(1565) and rho (1450) states and their interferences, but a meaningful statistical indication for a pi (+)pi (+) scalar state at about 1400 MeV emerges from the analysis.

An analysis of the contribution of isospin two pipi resonant states in the nbar--pi+pi+pi- annihilation reaction

BOTTA, Elena;BRESSANI, Tullio;COSTA, Sergio;MARCELLO, Simonetta;BALESTRA, Ferruccio;BUSSO, Luigi;FERRERO, Livio;GARFAGNINI, Raffaello;GRASSO, Antonino;PANZIERI, Daniele;Bussa MP;
2000

Abstract

The results of a search for a possible evidence of a pi (+)pi (+) resonant state in the (n) over barp --> pi (+)pi (+)pi (-) annihilation reaction with data collected by the OBELIX Experiment are presented. The study has been performed by means of a partial wave analysis in the frame of the isobar model. Production fractions for a possible pi (+)pi (+) resonance have been evaluated. The observed effects at the pi (+)pi (+) threshold may be described reasonably well by the contributions of f(2)(1270), f(0)(1500), f(2)(1565) and rho (1450) states and their interferences, but a meaningful statistical indication for a pi (+)pi (+) scalar state at about 1400 MeV emerges from the analysis.
B 495
284
288
antineutron-proton annihilation in flight in three charged pions; isobar model; isospin 2 resonant states; q(2)(q)over-bar(2) exotic states
Filippi A; Agnello M; Astrua M; Botta E; Bressani T; Calvo D; Costa S; D'Isep F; Feliciello A; Iazzi F; Marcello S; Minetti B; Mirfakhraee N; Balestra F; Busso L; Denisov O; Ferrero L; Garfagnini R; Grasso A; Maggiora A; Panzarasa A; Panzieri D; Tosello F; Bertin A; Bruschi M; Cannata F; Capponi M; De Castro S; Dona R; Galli D; Giacobbe B; Marconi F; Massa I; Piccinini M; Poli M; Cesari NS; Spighi R; Vagnoni V; Vecchi S; Villa M; Vitale A; Zoccoli A; Bianconi A; Bonomi G; Bussa MP; 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; Filippini V; Fontana A; Montagna P; Rotondi A; Salvini P; Tessaro S
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/21460
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