Main Image
Volume 336 - XIII Quark Confinement and the Hadron Spectrum (Confinement2018) - C: Heavy quarks
Charm Quark Mass with Calibrated Uncertainty
P.M. Queralt,* J.P.A. Erler, H. Spiesberger
*corresponding author
Full text: pdf
Pre-published on: 2019 September 12
Published on: 2019 September 26
We determine the charm quark mass $m_c(m_c)$ from QCD sum rules of moments of the vector current correlator calculated in perturbative QCD. Only experimental data for the charm resonances below the continuum threshold are needed in our approach, while the continuum contribution is determined by requiring self-consistency between various sum rules, including the one for the zeroth moment. Existing data from the continuum region can then be used to bound the theoretical error. Our result is $m_c(m_c)=1272 \pm 8$ MeV for $α_s(M_Z)=0.1182$. Special attention is given to the question how to quantify and justify the uncertainty.
Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.