MSbar Charm Mass from Charmonium Sum Rules with Contour Improvement

Details MSbar Charm Mass from Charmonium Sum Rules with Contour Improvement MSbar Charm Mass from Charmonium Sum Rules with Contour Improvement

2004-03-08

arxiv.org/abs/hep-ph/0403083v1

Phys.Lett.B594:127-134,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, latex, 1 postscript figures included

Scientific paper

10.1016/j.physletb.2004.04.080

A detailed error analysis is carried out for the determination of the MSbar charm quark mass $\bar m_c(\bar m_c)$ 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 $\bar m_c(\bar m_c)=1.29\pm 0.07$ GeV which contains a substantial theoretical uncertainty.

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