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The experimental results obtained in the last few years on kaon decays (K ? 2 ? and, above all, Ke4 decays) allow a reliable, model-independent determination of low energy ? ? scattering in the S0 wave. Using them and, eventually, other sets of[...]texto impreso
Ruiz de Elvira, Jacobo ; Garcia Martin, R. ; Kami?ski, Robert ; Peláez Sagredo, José Ramón | American Institute of Physics | 2011We show how the new precise data on kaon decays together with forward dispersion relations, sum rules and once- and twice-subtracted Roy equations allow for a precise analysis of ? ? scattering. The once subtracted Roy equations provide a more [...]texto impreso
Peláez Sagredo, José Ramón ; Garcia Martin, R. ; Kami?ski, Robert ; Ynduráin, F. J. | Amer Inst Physics | 2008We review our recent analysis of ?? scattering data in terms of Roy equations and Forward Dispersion Relations, and present some preliminary results in terms of a new set of oncesubtracted coupled equations for partial waves. The first analysis[...]texto impreso
Kami?ski, Robert ; Garcia Martin, R. ; Peláez Sagredo, José Ramón ; Ruiz de Elvira, J. | Elsevier Science BV | 2013-01Use of the new and precise dispersive equations with imposed crossing symmetry condition to solve the longstanding puzzle in the parameters of the f_o(500), as well as the f_o(980) is presented. This puzzle is finally being settled thanks to ana[...]texto impreso
We review how the use of recent precise data on kaon decays together with forward dispersion relations (FDR) and Roy’s equations allow us to determine the ? resonance pole position very precisely, by using only experimental input. In addition, w[...]
