An improved pion-pion dispersive fit with G-waves and forward dispersion relations up to 1.6 GeV yields stable resonance poles and no rho(1250) signal.
Hyams et al.,饾湅饾湅 phase shift analysis from 600 MeV to 1900 MeV, Nucl
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Improving $\pi\pi$ dispersive analyses and resonance determination with Forward Dispersion Relations
An improved pion-pion dispersive fit with G-waves and forward dispersion relations up to 1.6 GeV yields stable resonance poles and no rho(1250) signal.