Sala Seminarios IFIC (Edf. Institutos de Investigación)
Sala Seminarios IFIC
Edf. Institutos de Investigación
Descripción
The charm quark mass is obtained from a QCD sum rule analysis of the charmonium system. In this investigation we include results from nonrelativistic QCD at next-to-next-to-leading order. Using the pole mass scheme, we obtain a value of M_c=1.70 +- 0.13 GeV for the charm pole mass. The introduction of a potential-subtracted mass leads to an improved scale dependence. The running MS-bar mass is then determined to be m_c(m_c)=1.23 +- 0.09 GeV.