Abstract
Applying the Veneziano formula to the process π +π −→π −A + 1 the Weinberg mass relation for the A 1 meson is derived by using the Adler's self consistency condition. It is also shown that G S/ G D ≈− m 2 ϱ, where G S and G D determine s and d-wave decay of A 1→ϱπ. This ratio (anamolous magnetic moment of A 1) ≈−1.
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