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• Electric charge 

<img src='content_image/333566.jpg'>

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 ′ . 

• Magnetic dipole moment 

• Electric quadrupole moment 

<img src='content_image/333567.jpg'>

<img src='content_image/333568.jpg'>

• Isospin limit The neutral and charged pions are almost degenerated. Taking the isospin limit the form factors become 

where λ$_{I}$ = ( M 4 ρ − 2Σ $^{2}$M2 $_{ρ}$) /M 4 $_{ρ}$. 

<img src='content_image/333569.jpg'>

<img src='content_image/333570.jpg'>

<img src='content_image/333571.jpg'>

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. 

