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arXiv · 1307.1219

Determination of $α_s$ and $m_c$ in deep-inelastic scattering

S. Alekhin·J. Blümlein·S. Moch
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Abstract

We describe the determination of the strong coupling constant $α_s(M_Z^2)$ and of the charm-quark mass $m_c(m_c)$ in the $\bar{\rm MS}$-scheme, based on the QCD analysis of the unpolarized World deep-inelastic scattering data. At NNLO the values of $α_s(M_Z^2)=0.1134\pm 0.0011(\text{exp})$ and $m_c(m_c)=1.24 \pm 0.03 (\text{exp})\,^{+0.03}_{-0.02} (\text{scale})\,^{+0.00}_{-0.07} (\text{th})$ are obtained and are compared with other determinations, also clarifying discrepancies.

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S. Alekhin, J. Blümlein, S. Moch. 2013-07-04. Determination of $α_s$ and $m_c$ in deep-inelastic scattering. https://doi.org/10.1142/s0217732313600183

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