Resonance Contributions to the Electromagnetic Low Energy Constants of Chiral Perturbation Theory

Details Resonance Contributions to the Electromagnetic Low Energy Constants of Chiral Perturbation Theory Resonance Contributions to the Electromagnetic Low Energy Constants of Chiral Perturbation Theory

1996-12-11

arxiv.org/abs/hep-ph/9612328v2

Nucl.Phys. B499 (1997) 319-348

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTex (uses epsfig.sty), 35 pages including 3 Postscript figures. The complete paper is also available via anonymous ftp at

Scientific paper

10.1016/S0550-3213(97)00348-9

The effective chiral Lagrangian of the strong and electromagnetic interactions of the pseudoscalar mesons at low energies depends on a set of low energy constants. We determine the contributions to the electromagnetic coupling constants at order $O(e^2 p^2)$, which arise from resonances within a photon loop. We give some implications of our results, in particular we discuss in detail the effects on the corrections to Dashen's theorem.

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