Abstract
The results of a search for a possible evidence of a π+π+ resonant state in the n̄p → π+π+π- 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. (C) 2000 Published by Elsevier Science B.V.
Original language | English |
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Pages (from-to) | 284-288 |
Number of pages | 5 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 495 |
Issue number | 3-4 |
DOIs | |
Publication status | Published - 14 Dec 2000 |
Externally published | Yes |
Keywords
- Antineutron-proton annihilation in flight in three charged pions
- Isobar model
- Isospin 2 resonant states
- qq̄ exotic states