%0 Journal Article
%A Peláez Sagredo, José Ramón
%A Rodas, A.
%A Ruiz De Elvira Carrascal, Jacobo
%T f(0)(1370) Controversy from dispersive meson-meson scattering data analyses
%D 2023
%@ 0031-9007
%U https://hdl.handle.net/20.500.14352/72282
%X We establish the existence of the long-debated f(0)(1370) resonance in the dispersive analyses of meson-meson scattering data. For this, we present a novel approach using forward dispersion relations, valid for generic inelastic resonances. We find its pole at (1245 +/- 40) - i(300(-70)(+30)) MeV in pi pi scattering. We also provide the couplings as well as further checks extrapolating partial-wave dispersion relations or with other continuation methods. A pole at (1380(-60)(+70)) - i(220(-70)(+80)) MeV also appears in the pi pi -> K (K) over bar over bar data analysis with partial-wave dispersion relations. Despite settling its existence, our model-independent dispersive and analytic methods still show a lingering tension between pole parameters from the pi pi and K (K) over bar channels that should be attributed to data.
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