Archivio Istituzionale della RicercaThe results of a search for a possible evidence of a π+π+ resonant state in the 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 π+π+ resonance have been evaluated. The observed effects at the π+π+ threshold may be described reasonably well by the contributions of f2(1270), f0(1500), f2(1565) and ρ(1450) states and their interferences, but a meaningful statistical indication for a π+π+ scalar state at about 1400 MeV emerges from the analysis.
An analysis of the contribution of isospin two ππ resonant states in the -np -> π+π+π- annihilation reaction / A., F., Agnello, M., M., A., E., B., T., B., D., C., S., C., F., D., A., F., Iazzi, F., S., M., Minetti, B., N., M., F., B., L., B., O., D., L., F., R., G., A., G., A., M., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 495:3-4(2000), pp. 284-288. [10.1016/S0370-2693(00)01276-4]
An analysis of the contribution of isospin two ππ resonant states in the -np -> π+π+π- annihilation reaction
AGNELLO, MICHELANGELO;IAZZI, Felice;MINETTI, Bruno;
2000
Abstract
The results of a search for a possible evidence of a π+π+ resonant state in the 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 π+π+ resonance have been evaluated. The observed effects at the π+π+ threshold may be described reasonably well by the contributions of f2(1270), f0(1500), f2(1565) and ρ(1450) states and their interferences, but a meaningful statistical indication for a π+π+ scalar state at about 1400 MeV emerges from the analysis.
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https://hdl.handle.net/11583/1407382
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