https://doi.org/10.1140/epjc/s10052-014-2749-y
Regular Article - Theoretical Physics
Isospin breaking effects in 
decays
Albert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, University of Bern, Sidlerstr. 5, 3012 , Bern, Switzerland
* e-mail: stoffer@itp.unibe.ch
Received:
10
December
2013
Accepted:
16
January
2014
Published online:
4
March
2014
In the framework of chiral perturbation theory with photons and leptons, the one-loop isospin-breaking effects in decays due to both the photonic contribution and the quark and meson mass differences are computed. A comparison with the isospin-breaking corrections applied by recent high statistics 
experiments is performed. The calculation can be used to correct the existing form factor measurements by isospin-breaking effects that have not yet been taken into account in the experimental analysis. Based on the present work, possible forthcoming experiments on decays could correct the isospin breaking effects in a more consistent way.
© SIF and Springer-Verlag Berlin Heidelberg, 2014
