TTP - TTP95-31 On the Corrections to Dashen's Theorem

Institute for Theoretical Particle Physics (TTP)

The electromagnetic corrections to the masses of the pseudoscalar mesons $\pi$ and $K$ are considered. We calculate in chiral perturbation theory the contributions which arise from resonances within a photon loop at order $O(e^2 m_q)$. Within this approach we find rather moderate deviations to Dashen's

Robert Baur and Res Urech

Phys. Rev. D53 6552–6557 1996

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TTP95-31 On the Corrections to Dashen's Theorem

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