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Discussion Session - Experiments

Discussion Session - Experiments. Discussion Session - Experiments. Conveners : C. Bini and B. Ketzer Recent results on pi-pi amplitudes at BES III (10’+5’) B. Liu (Institute of High Energy Physics ) Search for exotics in three pion production at COMPASS (10’+5’)

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Discussion Session - Experiments

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  1. Discussion Session - Experiments

  2. Discussion Session - Experiments Conveners: C. Biniand B. Ketzer Recentresults on pi-piamplitudesat BES III (10’+5’) B. Liu (Institute of High EnergyPhysics) Searchforexotics in threepionproductionat COMPASS (10’+5’) S. Neubert (TU-Munchen) Searchforexotics in threepionproductionat CLAS (10’+5’) P. Eugenio (Florida State University) Discussion (45’)

  3. Status of Analyses • Isobar model analysis • isobar parameterizations: r, (pp)S • rank of fit, full vs partial coherence • leakage, acceptance, resolution • t dependence • estimation of systematic error • Signals for exotic mesons • diffraction, pbarp: rp, hp, h’p, f1p, b1p • photoproduction: none • Scalar sector: • low-mass scalars • glueballvs ordinary qqbar

  4. What is needed in the future? • Go beyond isobar model: • where does the model fail!? • include non-resonant production (dynamical effects, e.g. Deck) • understand a1! • multi-particle final states • coupled-channel analysis • final state interactions, unitarity • understand production mechanism: bins in t, s, polarization, probes • higher statistics, enlarge phase space • Tools, etc. • common PWA framework across different experiments • plugin for amplitudes • validation of software • computing: fitting procedures, GPUs, etc. • access to data

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