Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-10-13
Nucl.Phys.Proc.Suppl.186:312-317,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
Invited talk in the QCD08 14th International QCD Conference. 7-12th July 2008 Montpellier (France)
Scientific paper
10.1016/j.nuclphysbps.2008.12.07
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.
Garcia-Martin R.
Kaminski Robert
Pelaez Jose Ramon
Yndurain F. J.
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