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ρ ⁰–γ mixing in the neutral channel pion form factor and its role in comparing e ⁺ e ⁻ with τ spectral functions

Fred Jegerlehner and Robert Szafron

Eur. Phys. J. C, 71 5 (2011) 1632

DOI: https://doi.org/10.1140/epjc/s10052-011-1632-3

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