Dichotomy of the pion Mass Formula for 0 — Mesons  Mass-squared of the pseudscalar hadron  Sum of the current-quark masses of the constituents; e.g., pion = m u ς + m d ς, where ς is the renormalisation point USC School on Non-Perturbative Physics: 26/7-10/8 Craig Roberts: Emergence of DSEs in Real-World QCD 2A (84) 13 Maris, Roberts and Tandy nucl-th/9707003nucl-th/9707003, Phys.Lett.
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