QCD Sum Rules for Heavy-Meson Decay Constants: Impact of Renormalization Scale and Scheme

Abstract

Within the realm of QCD sum rules, one of the most important areas of application of this nonperturbative approach is the prediction of the decay constants of heavy mesons. However, in spite of the fact that, indisputably, the adopted techniques are, of course, very similar, we encounter rather dissimilar challenges, or obstacles, when extracting from two-point correlators of appropriate heavy-light currents interpolating the mesons, the characteristics of charmed mesons with different spin. In view of this, it seems worthwhile to us to revisit this issue for the case of charmed pseudoscalar mesons $D_{(s)}$ and vector mesons $D_{(s)}^{\ast }.$

5 pages, 3 figures, contributed to "Quark Confinement and the Hadron Spectrum XI" (8 - 12 September 2014, St. Petersburg, Russia)

References in corpus (17)

• Big-Bang Nucleosynthesis
• f_B and f_B_s from QCD sum rules
• Decay constants of heavy-light vector mesons from QCD sum rules
• The effective continuum threshold in dispersive sum rules
• OPE, charm-quark mass, and decay constants of D and D_s mesons from QCD sum rules
• Decay constants of the charmed vector mesons $D^{\ast }$ and $D_s^{\ast }$ from QCD sum rules
• Systematic uncertainties of hadron parameters obtained with QCD sum rules
• Decay constants of heavy pseudoscalar mesons from QCD sum rules
• Three-loop non-diagonal current correlators in QCD and NLO corrections to single-top-quark production
• Heavy-light current correlators at order ${\alpha }_s^2$ in QCD and HQET
• Extraction of ground-state decay constant from dispersive sum rules: QCD vs potential models
• Can one control systematic errors of QCD sum rule predictions for bound states?
• Accuracy of bound-state form factors extracted from dispersive sum rules
• Hadron form factors from sum rules for vacuum-to-hadron correlators
• Effective continuum threshold for vacuum-to-bound-state correlators
• Bound-state parameters from dispersive sum rules for vacuum-to-vacuum correlators
• Extraction of bound-state parameters from dispersive sum rules