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SUMMARY:Charm Mass Determination from QCD Charmonium Sum Rules at Order al
 pha_s^3
DTSTART;VALUE=DATE-TIME:20110121T110000Z
DTEND;VALUE=DATE-TIME:20110121T120000Z
DTSTAMP;VALUE=DATE-TIME:20260702T072727Z
UID:indico-event-1782@indico.ific.uv.es
DESCRIPTION:We determine the MS-bar charm quark mass from a charmonium QCD
  sum rules analysis. On the theoretical side we use input from perturbatio
 n theory at alpha_s^3. Improvements with respect to previous analyses incl
 ude (1) an account of all available e+ e- hadronic cross section data and 
 (2) an appropriate estimate of perturbative uncertainties. Using a method 
 to combine different hadronic cross section data sets we demonstrate that 
 using all available experimental data up to c.m. energies of 10.5 GeV allo
 ws for determinations of experimental moments and their correlations with 
 small errors and that there is no need to rely on theoretical input above 
 the charmonium resonances. We also show that the good convergence properti
 es of the perturbative series for the theoretical sum rule moments need to
  be considered with some care and that a wider range of scheme variations 
 has to be applied to obtain a more appropriate estimate of the perturbativ
 e uncertainty.\n\nhttps://indico.ific.uv.es/event/1782/
LOCATION:Edf. Institutos de Investigación Sala Seminarios IFIC
URL:https://indico.ific.uv.es/event/1782/
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