| Issue |
EPJ Web Conf.
Volume 199, 2019
MESON 2018 – 15th International Workshop on Meson Physics
|
|
|---|---|---|
| Article Number | 02003 | |
| Number of page(s) | 4 | |
| Section | Light Systems | |
| DOI | https://doi.org/10.1051/epjconf/201919902003 | |
| Published online | 01 February 2019 | |
https://doi.org/10.1051/epjconf/201919902003
Recent progress in the partial wave analysis of the diffractively produced π−π+π− final state at Compass
Technische Universität München, Munich, Germany
* e-mail: fabian-krinner@mytum.de
Published online: 1 February 2019
The Compass spectrometer at CERN has collected a large data set for diffractive three-pion production of 46 × 106 exclusive events. Based on previous conventional Partial-Wave Analyses (PWA), we performed a “freed-isobar PWA” on the same data, removing model assumptions on the dynamic isobar amplitudes for dominating waves. In this analysis, we encountered continuous mathematical ambiguities, which we were able to identify and resolve. This analysis gives an unprecedented insight in the interplay of 2π and 3π dynamics in the process. As an example we show results for a spin-exotic wave 
wave.
© The Authors, published by EDP Sciences, 2019
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