• Electric charge • Magnetic dipole moment • Electric quadrupole moment • Isospin limit The neutral and charged pions are almost degenerated. Taking the isospin limit the form factors become where, Γ$_{ρ}$ /M$_{ρ}$ ≡ g $^{2}$λ3 / $^{2}$/ 48 π , g is the effective ρππ coupling constant , and Δ 2 ≡ m 2 π − m 2 π ′ and Σ 2 ≡ m 2 π + m 2 π ′ . The corrections for the K ∗ + meson follows from the results for the ρ meson by including the two possible channels for the loop contributions: K ∗ + → K $^{+}$π0 and K ∗ + → K $^{0}$π$^{+}$, with the corresponding masses and partial decay widths. where λ$_{I}$ = ( M 4 ρ − 2Σ $^{2}$M2 $_{ρ}$) /M 4 $_{ρ}$. 6 α$_{ρ}$ (0) = 1 + i Γ$_{ρ}$ M$_{ρ}$ ( 1 − 3(Δ 4 − Σ $^{2}$M2 $_{ρ}$) M 4 $_{ρ}$λ ) , (15) β$_{ρ}$ (0) = 2 + i Γ$_{ρ}$ M$_{ρ}$ ( 2 + 3(Σ 2 − Δ $^{2}$) M 2 $_{ρ}$λ ) (16) γ$_{ρ}$ (0) = i Γ$_{ρ}$ M$_{ρ}$ M 2 $_{ρ}$λ (2Δ 4 − M 2 $_{ρ}$(Σ 2 + Δ $^{2}$)) + (Σ2 − Δ $^{2}$)(Δ4 − M 2 $_{ρ}$Σ $^{2}$) M 6 $_{ρ}$λ 2 (17) α$_{ρ}$ (0) = 1 + i Γ$_{ρ}$ M$_{ρ}$ ( 1 + 3Σ 2 M 2 $_{ρ}$λ$_{I}$ ) (18) β$_{ρ}$ (0) = 2 + i Γ$_{ρ}$ M$_{ρ}$ ( 2 + 3Σ 2 M 2 $_{ρ}$λ$_{I}$ ) (19) γ$_{ρ}$ (0) = − i Γ$_{ρ}$ M$_{ρ}$ Σ $^{2}$( M 2 $_{ρ}$λ$_{I}$ + Σ $^{2}$) M 4 $_{ρ}$λ 2 I (20)