Spin-parity analysis of the final state π+π-π0 from p̄p annihilation at rest in hydrogen targets at three densities

A. Bertin, M. Bruschi, M. Capponi, A. Collamati, C. Damiani, S. De Castro, R. Donà, A. Ferretti, L. Filippi, D. Galli, B. Giacobbe, U. Marconi, I. Massa, M. Piccinini, M. Poli, N. Semprini-Cesari, R. Spighi, V. Vagnoni, S. Vecchi, A. VezzaniF. Vigotti, M. Villa, A. Vitale, A. Zoccoli, M. Corradini, A. Donzella, E. Lodi Rizzini, L. Venturelli, A. Zenoni, C. Cicaló, A. Masoni, G. Puddu, S. Serci, P. P. Temnikov, G. Usai, O. E. Gorchakov, S. N. Prakhov, A. M. Rozhdestvensky, M. G. Sapozhnikov, V. I. Tretyak, P. Gianotti, C. Guaraldo, A. Lanaro, V. Lucherini, F. Nichitiu, C. Petrascu, A. Rosca, V. G. Ableev, C. Cavion, U. Gastaldi, G. Maron, R. A. Ricci, L. Vannucci, G. Vedovato, G. Bendiscioli, V. Filippini, A. Fontana, P. Montagna, A. Rotondi, A. Saino, P. Salvini, C. Scoglio, F. Balestra, E. Botta, T. Bressani, M. P. Bussa, L. Busso, D. Calvo, P. Cerello, S. Costa, O. Denisov, L. Fava, A. Feliciello, L. Ferrero, A. Filippi, R. Garfagnini, A. Grasso, A. Maggiora, S. Marcello, D. Panzieri, D. Parena, E. Rossetto, F. Tosello, L. Valacca, M. Agnello, F. Iazzi, B. Minetti, G. Pauli, S. Tessaro, L. Santi

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

Abstract

The partial wave analysis of the reaction p̄p → π+π-π0 at rest has been performed for the first time by using high-statistics data sets collected in hydrogen targets at three different densities. The different mixtures of partial waves corresponding to our samples allow a reliable determination of each contribution. This technique is crucial in the identification of the exotic candidate f2(1565) which can be produced by 1S0, 3P1 and 3P2 initial states. The amplitude analysis was performed in the frame of the K-Matrix and P-Vector approach. It requires the presence of the exotic candidates f0(1500) and f2(1565) with the following masses and total widths: (1449 ± 20)MeV, (114 ± 30)MeV and (1507 ± 15)MeV, (130 ± 20)MeV respectively. In addition to f0(980), f0(1300) f2(1270) and ρ(770), a clear evidence of I = 1, JP = 1- signal, which we identify with ρ(1450), is obtained.

Lingua originaleInglese
pagine (da-a)476-486
Numero di pagine11
RivistaPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume408
Numero di pubblicazione1-4
DOI
Stato di pubblicazionePubblicato - 11 set 1997
Pubblicato esternamente

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