An analysis of the contribution of isospin two pi pi resonant states in the (n)over-barp -> pi(+)pi(+)pi(-) annihilation reaction

Authors
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
Citation
A. Filippi et al., An analysis of the contribution of isospin two pi pi resonant states in the (n)over-barp -> pi(+)pi(+)pi(-) annihilation reaction, PHYS LETT B, 495(3-4), 2000, pp. 284-288
Citations number
19
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
03702693 → ACNP
Volume
495
Issue
3-4
Year of publication
2000
Pages
284 - 288
Database
ISI
SICI code
0370-2693(200012)495:3-4<284:AAOTCO>2.0.ZU;2-M
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 wit h 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 m odel. Production fractions for a possible pi (+)pi (+) resonance have been evaluated. The observed effects at the pi (+)pi (+) threshold may be descri bed reasonably well by the contributions of f(2)(1270), f(0)(1500), f(2)(15 65) and rho (1450) states and their interferences, but a meaningful statist ical indication for a pi (+)pi (+) scalar state at about 1400 MeV emerges f rom the analysis. (C) 2000 Published by Elsevier Science B.V.