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VOLUME 59 (1994) | ISSUE 2 | PAGE 75
Search for a narrow resonance in the ppπ- system
Preliminary results of the analysis of the ρρπ~ system produced in the reaction ρρ-*ρρπ~π+ reveal a resonance with a mass Af~2.06 GeV and a width < 15 MeV. The mass spectrum of the system pptr~, which can have any quantum numbers, including those forbidden in the np system, has been investigated for the first time. The observed resonance in the ρρπ~ mass spectrum is in agreement with the quark models, and it confirms the recently proposed explanation of the peculiar features in the low-energy pionic double charge exchange on nuclei.