Isospin breaking in K > 3 pi decays III: Bremsstrahlung and fit to experiment
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Abstract
We complete here our work on isospin violation in the K > 3 pi system. We first calculate K > 2 pi to the same order as we did K > 3 pi in papers I and II of this series. This adds the effects of order G(27)p(2)(m(u)  m(d)) and G(27)p(2)e(2) to earlier work. We calculate also the lowest order bremsstrahlung contributions, K > 2 pi gamma, 3 pi gamma. With these and our earlier results we perform a full fit to all available CPconserving data in the K > 2 pi, 3 pi system including isospin violation effects. We perform these fits under various input assumptions as well as test the factorization and the vector dominance model for the weak NLO low energy constants.
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Research areas and keywords  Subject classification (UKÄ) – MANDATORY

Original language  English 

Pages (fromto)  383394 
Journal  European Physical Journal C. Particles and Fields 
Volume  40 
Issue number  3 
Publication status  Published  2005 
Publication category  Research 
Peerreviewed  Yes 