Dispersive analysis of the $S$-, $P$-, $D$-, and $F$-wave $\pi \pi$ amplitudes

P. Bydžovský, R. Kamiński, V. Nazari

A reanalysis of $\pi \pi$ amplitudes for all important partial-waves below about 2 GeV is presented. A set of once subtracted dispersion relations with imposed crossing symmetry conditi…