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28 March 2024
 
  » arxiv » hep-ph/0403083

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MSbar Charm Mass from Charmonium Sum Rules with Contour Improvement
A. H. Hoang ; M.Jamin ;
Date 8 Mar 2004
Journal Phys.Lett. B594 (2004) 127-134
Subject hep-ph
AffiliationMunich, Max Planck Inst.) and M.Jamin (Heidelberg U.
AbstractA detailed error analysis is carried out for the determination of the MSbar charm quark mass $ar m_c(ar m_c)$ from moments at order alpha_s^2 of the charm cross section in e^+e^- annihilation. To estimate the theoretical uncertainties the renormalization scale is implemented in various ways including energy-dependent functions, which lead to ``contour-improved’’ predictions. We obtain $ar m_c(ar m_c)=1.29pm 0.07$ GeV which contains a substantial theoretical uncertainty.
Source arXiv, hep-ph/0403083
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