The isospin symmetry breaking effects in $K_{e4}$ decays

Abstract

The Fermi-Watson theorem is generalized to the case of two coupled channels with different masses and applied to final state interaction in $K_{e4}$ decays. The impact of considered effect on the phase of the $\pi \pi$ scattering is estimated and shown that it can be crucial for scattering lengths extraction from experimental data on $K_{e4}$ decays.

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Cited by in corpus (3)

• Isospin breaking in Kl4 decays
• Theoretical progress on cusp effect and Kl4 decays
• The electromagnetic effects in $K_{e4}$ decay