Abstract
A calculation for the one‐loop pion vector form‐factor in Resonance Chiral Theory is provided in this talk. The amplitude is computed up to next‐to‐leading order in 1/NC and, by means of high‐energy constraints, we are able to produce a prediction for the corresponding O(p4) Chiral Perturbation Theory low energy constant L9(μ0) = (7.6±0.6)⋅10−3 at the scale μ0 = 770 MeV.
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