Charm mass determination from QCD charmonium sum rules at order α[3 over s]
Author(s)
Dehnadi, Bahman; Hoang, Andre H.; Zebarjad, S. Mohammad; Barreda, Vicent Mateu
DownloadMateu_Charm Mass.pdf (2.284Mb)
PUBLISHER_POLICY
Publisher Policy
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Terms of use
Metadata
Show full item recordAbstract
We determine the [bar over MS] charm quark mass from a charmonium QCD sum rules analysis. On the theoretical side we use input from perturbation theory at O(α[3 over s]) . Improvements with respect to previous O(α[3 over s]) analyses include (1) an account of all available e [superscript +] e [superscript −] hadronic cross section data and (2) a thorough analysis of perturbative uncertainties. Using a data clustering method to combine hadronic cross section data sets from different measurements we demonstrate that using all available experimental data up to c.m. energies of 10.538 GeV allows for determinations of experimental moments and their correlations with small errors and that there is no need to rely on theoretical input above the charmonium resonances. We also show that good convergence properties of the perturbative series for the theoretical sum rule moments need to be considered with some care when extracting the charm mass and demonstrate how to set up a suitable set of scale variations to obtain a proper estimate of the perturbative uncertainty. As the final outcome of our analysis we obtain [bar over m[subscript c]]([bar over m[subscript c]]) = 1.282 ± (0.006)[subscript stat] ± (0.009)[subscript syst] ± (0.019)[subscript pert] ± (0.010)[subscript αs] ± (0.002)[subscript ⟨GG⟩] GeV. The perturbative error is an order of magnitude larger than the one obtained in previous O(α[3 over s]) sum rule analyses.
Date issued
2013-09Department
Massachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Dehnadi, Bahman, Andre H. Hoang, Vicent Mateu, and S. Mohammad Zebarjad. “Charm mass determination from QCD charmonium sum rules at order α[3 over s].” J. High Energ. Phys. 2013, no. 9 (September 2013).
Version: Author's final manuscript
ISSN
1029-8479
1126-6708