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SUMMARY:Duality violations and spectral sum rules
DTSTART;VALUE=DATE-TIME:20060524T130000Z
DTEND;VALUE=DATE-TIME:20060524T140000Z
DTSTAMP;VALUE=DATE-TIME:20261112T220131Z
UID:indico-event-1506@indico.ific.uv.es
DESCRIPTION:We have investigated the effects of quark-hadron duality viola
 tions in a simple model for the difference of the vector and axial-vector 
 two-point functions. The advantage of using a model is that OPE coefficien
 ts and spectral moments can be exactly calculated\, and thus compared. The
  model also applies to a finite number of colors. It gives a semi-realisti
 c description of actual data\, and we use this to get an idea of the size 
 of the errors made with various approaches which have been used in practic
 e with regard to duality violations. We find that in the model duality vio
 lations are large. We suggest a heuristic method for taking duality violat
 ions into account.\n\nhttps://indico.ific.uv.es/event/1506/
LOCATION:Edf. Institutos de Investigación Sala Seminarios IFIC
URL:https://indico.ific.uv.es/event/1506/
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