In memory of Paco Yndurain: A precise determination of pion-pion scattering from experiment and dispersion relations

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 $\pi \pi$ 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)

References in corpus (4)

• The pion-pion scattering amplitude. III: Improving the analysis with forward dispersion relations and Roy equations
• Experimental status of the $\pi \pi$ isoscalar S wave at low energy: $f_0(600)$ pole and scattering length
• On the dispersion theory of $\pi \pi$ scattering
• Precise determination of the sigma pole location from a dispersive analysis

Cited by in corpus (2)

• Gluonium nature of the sigma/f_0(600) from its coupling to KK
• Light scalar mesons in QCD