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Recent progress in the partial-wave analysis of the diffractively produced $\pi^-\pi^+\pi^-$ final state at COMPASS
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 amplitu...
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| Lenguaje: | eng |
| Publicado: |
2019
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| Acceso en línea: | https://dx.doi.org/10.1051/epjconf/201919902003 http://cds.cern.ch/record/2636700 |
| _version_ | 1780959903388532736 |
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| author | Krinner, Fabian |
| author_facet | Krinner, Fabian |
| author_sort | Krinner, Fabian |
| collection | CERN |
| description | 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. |
| id | cern-2636700 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2019 |
| record_format | invenio |
| spelling | cern-26367002023-03-14T19:23:41Zdoi:10.1051/epjconf/201919902003http://cds.cern.ch/record/2636700engKrinner, FabianRecent progress in the partial-wave analysis of the diffractively produced $\pi^-\pi^+\pi^-$ final state at COMPASShep-phParticle Physics - Phenomenologyhep-exParticle Physics - ExperimentThe 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 COMPASS spectrometer at CERN has collected a large data set for diffractive three-pion production of $46\times10^6$ 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 $2\pi$ and $3\pi$ dynamics in the process. As an example we show results for a spin-exotic wave $J^{PC}_{X^-}=1^{-+}$ wave.arXiv:1808.09207oai:cds.cern.ch:26367002019 |
| spellingShingle | hep-ph Particle Physics - Phenomenology hep-ex Particle Physics - Experiment Krinner, Fabian Recent progress in the partial-wave analysis of the diffractively produced $\pi^-\pi^+\pi^-$ final state at COMPASS |
| title | Recent progress in the partial-wave analysis of the diffractively produced $\pi^-\pi^+\pi^-$ final state at COMPASS |
| title_full | Recent progress in the partial-wave analysis of the diffractively produced $\pi^-\pi^+\pi^-$ final state at COMPASS |
| title_fullStr | Recent progress in the partial-wave analysis of the diffractively produced $\pi^-\pi^+\pi^-$ final state at COMPASS |
| title_full_unstemmed | Recent progress in the partial-wave analysis of the diffractively produced $\pi^-\pi^+\pi^-$ final state at COMPASS |
| title_short | Recent progress in the partial-wave analysis of the diffractively produced $\pi^-\pi^+\pi^-$ final state at COMPASS |
| title_sort | recent progress in the partial-wave analysis of the diffractively produced $\pi^-\pi^+\pi^-$ final state at compass |
| topic | hep-ph Particle Physics - Phenomenology hep-ex Particle Physics - Experiment |
| url | https://dx.doi.org/10.1051/epjconf/201919902003 http://cds.cern.ch/record/2636700 |
| work_keys_str_mv | AT krinnerfabian recentprogressinthepartialwaveanalysisofthediffractivelyproducedpipipifinalstateatcompass |