T-odd correlations in radiative Kl3+ decays and chiral perturbation theory
Eike H. Müller, Bastian Kubis, Ulf-G. Meißner
Abstract
The charged kaon decay channel Kl3gamma+ allows for studies of direct CP violation, possibly due to non-standard mechanisms, with the help of T-odd correlation variables. In order to be able to extract a CP-violating signal from experiment, it is necessary to understand all possible standard model phases that also produce T-odd asymmetries. We complement earlier studies by considering strong interaction phases in hadronic structure functions that appear at higher orders in chiral perturbation theory, and compare our findings to other potential sources of asymmetries.
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