Review examines pi pi scattering, determines resonance parameters, implying precise understanding of particle interactions.
In this paper, we review our recent work on \(π π \) scattering. We present new global fits that describe all experimental data up to 1.8 GeV while satisfying dispersive constraints, within uncertainties, up to 1.6 GeV. Using continued fractions to continue forward dispersion relations analytically, we extract the pole parameters of the \(f_0(500)\), \(ρ (770)\), \(f_0(980)\), \(f_2(1270)\), \(f_0(1370)\), \(ρ (1450)\), \(f_0(1500)\), and \(ρ _3(1690)\) in a model-independent way. Abstract Published by the Jagiellonian University 2026 authors
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Rabán et al. (2026) studied this question.
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