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

We determine the charm-quark mass m(c)(m(c)) in the (MS) over bar scheme using measurements of charm production in deep-inelastic ep scattering at HERA in the kinematic range of photon virtuality 5 GeV2 < Q(2) < 1000 GeV2 and Bjorken scaling variable 10(-5) < x < 10(-1). The extraction of m(c) from this process with space-like kinematics provides complementary information to results from hadronic processes. The QCD analysis of the HERA data yields a value of m(c)(m(c)) = 1.27 +/- 0.05(exp)(-0.01)(+0.06) (scale) GeV at next-to-leading order and of m(c)(m(c)) = 1.36 +/- 0.04(exp)(-0.00)(+0.04)(scale) +/- 0.1(theory) GeV at approximate next-to-next-to-leading order. The results are consistent with and of comparable precision as the world average. (C) 2012 Elsevier B.V. All rights reserved.