S-matrix approach to two-pion production in e+e- annihilation and tau decay
Abstract
Based on the S-matrix approach, we introduce a modified formula for the π electromagnetic form factor which describes very well the experimental data in the energy region 2mπ ≤ s ≤ 1.1 GeV. Using the CVC hypothesis we predict B() = (24.75 0.38)\% , in excellent agreement with recent experiments.
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