Archivio Istituzionale della RicercaThe spin-parity analysis of the (n) over bar p --> pi(+)pi(+)pi(-) exclusive reaction in flight is presented. The main aim is to study the (pi(+)pi(-)) invariant mass spectrum in the region around 1500 MeV. The analysis was performed with a Breit-Wigner parametrization for all the resonant states and, for the scalar sector in the mass region below 1.2 GeV, by means of a K-matrix-like treatment. It clearly shows the need for two states, a scalar one (0(++)) with mass and width (1522+/-25) MeV and (108+/-33) MeV, and a tensorial one (2(++)) with mass (1575 +/-18) MeV and width (119+/-24) MeV, respectively. In addition, the analysis requires the presence of a scalar state at (1280+/-55) MeV, (323+/-13) MeV broad, and of a second vectorial one, in addition to the rho(0)(770) signal, with mass and width (1348+/-33) MeV and (275+/-10) MeV, respectively.
Study of the f(0)(1500)/f(2)(1565) production in the exclusive annihilation anti-n.anti-p -> pi+.pi+.pi- in flight / A., Bertin; M., Bruschi; M., Capponi; A., Collamati; S., De Castro; R., Donà; A., Ferretti; D., Galli; B., Giacobbe; U., Marconi; M., Piccinini; M., Poli; N., Semprini Cesari; R., Spighi; S., Vecchi; A., Vezzani; F., Vigotti; M., Villa; A., Vitale; A., Zoccoli; M., Corradini; A., Donzella; E., Lodi Rizzini; L., Venturelli; A., Zenoni; C., Cicalò; A., Masoni; G., Puddu; S., Serci; P., Temnikov; G., Usai; O. E., Gortchakov; 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., Ableev; C., Cavion; U., Gastaldi; M., Lombardi; G., Maron; L., Vannucci; G., Vedovato; G., Bendiscioli; V., Filippini; A., Fontana; P., Montagna; A., Rotondi; A., Saino; P., Salvini; C., Scoglio; F., Balestra; D., Bergo; E., Botta; T., Bressani; M. P., Bussa; L., Busso; D., Calvo; P., Cerello; S., Costa; P., Damiani; O. Y., Denisov; F., D'Isep; C., Fanara; L., Fava; A., Feliciello; L., Ferrero; A., Filippi; R., Garfagnini; A., Grasso; A., Maggiora; S., Marcello; N., Mirfakhrai; D., Panzieri; E., Rossetto; F., Tosello; L., Valacca; Agnello, Michelangelo; Iazzi, Felice; Minetti, Bruno; G., Pauli; S., Tessaro; L., Santi. - In: PHYSICAL REVIEW D. - ISSN 0556-2821. - 57:1(1998), pp. 55-66. [10.1103/PhysRevD.57.55]
Study of the f(0)(1500)/f(2)(1565) production in the exclusive annihilation anti-n.anti-p -> pi+.pi+.pi- in flight
AGNELLO, MICHELANGELO;IAZZI, Felice;MINETTI, Bruno;
1998
Abstract
The spin-parity analysis of the (n) over bar p --> pi(+)pi(+)pi(-) exclusive reaction in flight is presented. The main aim is to study the (pi(+)pi(-)) invariant mass spectrum in the region around 1500 MeV. The analysis was performed with a Breit-Wigner parametrization for all the resonant states and, for the scalar sector in the mass region below 1.2 GeV, by means of a K-matrix-like treatment. It clearly shows the need for two states, a scalar one (0(++)) with mass and width (1522+/-25) MeV and (108+/-33) MeV, and a tensorial one (2(++)) with mass (1575 +/-18) MeV and width (119+/-24) MeV, respectively. In addition, the analysis requires the presence of a scalar state at (1280+/-55) MeV, (323+/-13) MeV broad, and of a second vectorial one, in addition to the rho(0)(770) signal, with mass and width (1348+/-33) MeV and (275+/-10) MeV, respectively.
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https://hdl.handle.net/11583/1845767
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