The results of a search for a possible evidence of a pi+pi+ resonant state in the nbar p --> 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 CC threshold may be described reasonably well by the contributions of f2(1270), f0(1500), f2(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 pi-pi resonant states in the anti-n p --> pi+pi+pi- annihilation reaction.
FONTANA, ANDREA;MONTAGNA, PAOLO MARIA;ROTONDI, ALBERTO;
2000-01-01
Abstract
The results of a search for a possible evidence of a pi+pi+ resonant state in the nbar p --> 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 CC threshold may be described reasonably well by the contributions of f2(1270), f0(1500), f2(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.File in questo prodotto:
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