Sequence transformations applied to the fixed-order QCD series for hadronic tau decays produce estimates c5,1 = 298 ± 15, c6,1 = 3431 ± 256, c7,1 = 2.29 ± 0.29 × 10^4 and a predicted δ^(0)_FOPT = 0.2119 ± 0.0040.
The QCD Running Coupling
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An overview of the contact interaction model shows it describes the mass spectrum and form factors of forty mesons and their diquark partners with comparisons to lattice QCD and other approaches.
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Symmetry Preserving Contact Interaction Approaches: An Overview of Meson and Diquark Form Factors
An overview of the contact interaction model shows it describes the mass spectrum and form factors of forty mesons and their diquark partners with comparisons to lattice QCD and other approaches.