Speaker
Jose Pelaez
(Universidad Complutense de Madrid)
Description
We determine the existence and much debated parameters of the f0(1300) light scalar resonance. We establish the existence of its associated pole in the complex plane, determining its parameters by means of analytic continuation method on a model-independent dispersively constrained analysis of ππ→ππ and ππ→K¯K data. We show how this pole appears consistently using Forward Dispersion Relations or Roy equations and different continuation methods. We also provide a simple parameterization of the ππ scattering data and their uncertainties up to ∼1.8 GeV, consistent with dispersion relations up to ∼1.4 GeV and with the poles of the f0(500), f0(980) and f0(1300) found in these dispersive studies.
