$π\to lνγ$ Form Factors at Two-loop

preprint1997arXivOpen access

Within Chiral Perturbation Theory (CHPT) we compute the form factors A, V and $γ= A/V$ in the $π\to νl γ$ decay to $O(p^6)$ . A and $γ$ obtain corrections of order 25%.

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$π\to lνγ$ Form Factors at Two-loop

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π→lνγπ\to lνγπ→lνγ Form Factors at Two-loop

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$π\to lνγ$ Form Factors at Two-loop