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arXiv · 1212.2355

Precise charm-quark mass from deep-inelastic scattering

S. Alekhin·J. Blumlein·K. Daum·K. Lipka·S. Moch
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Abstract

We present a determination of the charm-quark mass in the MSbar scheme using the data combination of charm production cross section measurements in deep-inelastic scattering at HERA. The framework of global analyses of the proton structure accounts for all correlations of the charm-quark mass with the other non-perturbative parameters, most importantly the gluon distribution function in the proton and the strong coupling constant alpha_s(M_Z). We obtain at next-to-leading order in QCD the value m_c(m_c) = 1.15 +- 0.04 (exp) +0.04/-0.00 (scale) GeV and at approximate next-to-next-to-leading order m_c(m_c) = 1.24 +- 0.03 (exp) +0.03/-0.02 (scale) +0.00/-0.07 (theory) GeV with an accuracy competitive with other methods.

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S. Alekhin, J. Blumlein, K. Daum, K. Lipka, S. Moch. 2012-12-11. Precise charm-quark mass from deep-inelastic scattering. https://doi.org/10.1016/j.physletb.2013.02.010

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