The Electromagnetic Interaction in Chiral Perturbation Theory

Details The Electromagnetic Interaction in Chiral Perturbation Theory The Electromagnetic Interaction in Chiral Perturbation Theory

1995-06-28

arxiv.org/abs/hep-ph/9506448v1

Z.Phys.C71:131-138,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, latex

Scientific paper

10.1007/s002880050156

We investigate electromagnetic effects in the framework of chiral perturbation theory. Using a completely independent method, we confirm Urech's results for the divergences of the one--loop functional in the electromagnetic sector. We perform a one--loop analysis of all $P_{\ell 2}$ ($P = \pi, K, \eta$) and the $K_{\ell 3}$ form factors $f_+^{K^+\pi^0}(0)$, $f_+^{K^0\pi^-}(0)$, including a systematic treatment of the $\cO(e^2p^2)$ contributions in the mesonic part. We illustrate our results by several numerical estimates.

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