Precise charm-quark mass from deep-inelastic scattering
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.
Cite
@article{arxiv.1212.2355,
title = {Precise charm-quark mass from deep-inelastic scattering},
author = {S. Alekhin and J. Blumlein and K. Daum and K. Lipka and S. Moch},
journal= {arXiv preprint arXiv:1212.2355},
year = {2015}
}
Comments
10 pages latex, 3 figures