Current quark mass and g−2 of muon and ee+→π+π−

Based on a phenomenologically successful effective chiral theory of pseudoscalar, vector, and axial-vector mesons the dependences of ρ–ω mixing and the vertex ωππ on md−mu are found. Using the new data of ee+→π−π+, md−mu has been determined to be 4.24 MeV. The form factor of pion agrees with data in both space- and time-like regions. The branching ratio of τ→ππν is computed to be 25.14% which agrees with data. CVC is satisfied. The values of g−2 of muon from ππ channel are calculated in the range of q2<1.32 GeV2.