Speaker
Achim Geiser
(Deutsches Elektronen-Synchrotron (DE))
Description
Combined HERA data on charm production in deeply inelastic scattering have earlier been used to determine the charm-quark running mass $m_c(m_c)$ in the $\overline{MS}$ renormalisation scheme. The same data are used differentially as a function of the photon virtuality $Q^2$ to evaluate the charm-quark running mass at different scales to one-loop order, in the context of a next-to-leading order QCD analysis. The scale dependence of the mass is found to be consistent with QCD expectations and a graphical representation of the charm-quark mass running is obtained from data for the first time.
Authors
Andrii Gizhko
(DESY)
S. Moch
(UHH)
Achim Geiser
(Deutsches Elektronen-Synchrotron (DE))
