QCD sum rule determination of the charm-quark mass
Feb, 2011
4 pages
Published in:
- Phys.Rev.D 83 (2011) 074014
e-Print:
- 1102.3835 [hep-ph]
PDG: -QUARK MASS
Report number:
- UCT-TP-284-11
View in:
Citations per year
Abstract: (arXiv)
QCD sum rules involving mixed inverse moment integration kernels are used in order to determine the running charm-quark mass in the scheme. Both the high and the low energy expansion of the vector current correlator are involved in this determination. The optimal integration kernel turns out to be of the form , where is the onset of perturbative QCD. This kernel enhances the contribution of the well known narrow resonances, and reduces the impact of the data in the range . This feature leads to a substantial reduction in the sensitivity of the results to changes in , as well as to a much reduced impact of the experimental uncertainties in the higher resonance region. The value obtained for the charm-quark mass in the scheme at a scale of 3 GeV is , where the error includes all sources of uncertainties added in quadrature.- 11.55.Hx
- 14.65.Dw
- 12.38.Lg
- 12.38.Bx
- quantum chromodynamics: sum rule
- quantum chromodynamics: perturbation theory
- current: correlation function
- current: vector
- narrow resonance
- sensitivity
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