Amplitude analysis of resonant production in three pions

Understand

We present some results on the analysis of three pion resonances.

• The analyses are motivated by the recent release of the largest data set on diffractively produced three pions by the COMPASS collaboration.
• We construct reaction amplitudes that satisfy fundamental $S$-matrix principles, which allows the use of models that have physical constraints to be used in fitting data.
• The models are motivated by the isobar model that satisfy unitarity constraints.