In memory of Paco Yndurain: A precise determination of pion-pion scattering from experiment and dispersion relations
arXiv:0810.2204 · doi:10.1016/j.nuclphysbps.2008.12.070
Abstract
This 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 $ÏÏ$ scattering amplitude including the most recent data by means of Forward Dispersion Relations and Roy Equations. A remarkable improvement in precision over the intermediate energy region is obtained by using once-subtracted Roy Equations in addition to the standard twice-subtracted ones.
Invited talk in the QCD08 14th International QCD Conference. 7-12th July 2008 Montpellier (France)