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SUMMARY:Consistency checks of pion-pion scattering  data and chiral disper
 sive calculations
DTSTART;VALUE=DATE-TIME:20050203T140000Z
DTEND;VALUE=DATE-TIME:20050203T150000Z
DTSTAMP;VALUE=DATE-TIME:20261113T110858Z
UID:indico-event-1408@indico.ific.uv.es
DESCRIPTION:We have evaluated forward dispersion relations for scattering 
 amplitudes that follow from direct fits to several sets of pion-pion scatt
 ering experiments\, together with the precise K decay results\, and high t
 o energy data. We find that some of the most commonly used experimental se
 ts\, as well as some recent theoretical analyses based on Roy equations by
  Colangelo Gasssr and Leutwyler\, do not satisfy these constraints by seve
 ral standard deviations\, in addition to other sum rules that were discuss
 ed in a previous talk. Finally\, we provide a consistent pion-pion amplitu
 de by improving a global fit to data with these dispersion relations.\n\nh
 ttps://indico.ific.uv.es/event/1408/
LOCATION:Edf. Institutos de Investigación Sala Seminarios IFIC
URL:https://indico.ific.uv.es/event/1408/
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