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We have evaluated forward dispersion relations for scattering amplitudes that follow from direct fits to several sets of ?? scattering experiments, together with the precise K decay results, and high to energy data. We find that some of the most[...]texto impreso
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We first review the results of an analysis of ? ? interactions in S, P and D waves for the two-pion effective mass from threshold to about 1.4GeV. In particular, we show a recent improvement of this analysis above the KK? threshold using more da[...]texto impreso
Peláez Sagredo, José Ramón ; Martin, R. ; García, R. ; Kami?ski, Robert ; Yndurain, F.J. | Elsevier Science BV | 2009-01This talk is dedicated to the memory of Paco Yndurain, the original speaker in the conference. After a short account of his scientific career, we briefly review our ongoing collaboration to determine precisely the pi pi scattering amplitude incl[...]texto impreso
Kami?ski, Robert ; Garcia-Martin, R. ; Grynkiewicz, P. ; Peláez Sagredo, José Ramón ; Yndurain, F.J. | World Scientific Publ Co Pte Ltd | 2009-01-30We present a set of once subtracted dispersion relations which implement crossing symmetry conditions for the ?? scattering amplitudes below 1 GeV. We compare and discuss the results obtained for the once and twice subtracted dispersion relation[...]texto impreso
Garcia-Martin, R. ; Kami?ski, Robert ; Peláez Sagredo, José Ramón ; Ruiz de Elvira, Jacobo ; Yndurain, F.J. | Amer Physical Soc | 2011-04-04We improve our description of ? ? scattering data by imposing additional requirements on our previous fits, in the form of once-subtracted Roy-like equations, while extending our analysis up to 1100 MeV. We provide simple and ready to use parame[...]
