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We determine the charm-quark mass mc(mc) in the MS-bar scheme usingmeasurements of charm production in deep-inelastic ep scattering at HERA in thekinematic range of photon virtuality from 5 to 1000 GeV squared and Bjorkenscaling variable from 0.0001 to 0.5. The extraction of charm quark mass fromthis process with space-like kinematics provides complementary information toresults from hadronic processes. The QCD analysis of the HERA data yields avalue of mc(mc) of 1.27 plus minus 0.05(exp) plus 0.06 minus 0.01(scale) GeV atnext-to-leading order and mc(mc) of 1.36 plus minus 0.04(exp) plus 0.04 minus0.00 (scale) plus minus 0.1(theory) GeV at approximate next-to-next-to-leadingorder. The results are consistent with and of comparable precision as the worldaverage.

Determination of the charm-quark mass in the MS-bar scheme using charm production data from deep inelastic scattering at HERA