ar X iv : h ep - e x / 05 10 07 5 v 1 2 7 O ct 2 00 5 PWA of 3 π Final States and a Search for the π 1 ( 1600 )
نویسنده
چکیده
Partial wave analyses (PWA) of the 3π systems in the reactions πp → π+π−π−p (the “charged” mode) and πp → π−π0π0 p (the “neutral” mode) with an 18.3 GeV/c pion beam were performed using high statistics data from the E852 experiment. Conventional signals, such as the a1(1260), the a2(1320), and the π2(1670), were found to be remarkably stable to the choice of waves included in the fit. In contrast, possible evidence for the π1(1600) in the JPC = 1−+ exotic wave amplitude disappears when additional decay modes of conventional mesons (especially those of the π2(1670)) are included in the PWA fit.
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