https://doi.org/10.1140/epjc/s10052-021-08951-x
Regular Article - Theoretical Physics
Dispersive analysis of the Primakoff reaction 
Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics, Universität Bonn, 53115, Bonn, Germany
Received:
11
December
2020
Accepted:
2
February
2021
Published online:
9
March
2021
We provide a dispersion-theoretical representation of the reaction amplitudes 
in all charge channels, based on modern pion–kaon P-wave phase shift input. Crossed-channel singularities are fixed from phenomenology as far as possible. We demonstrate how the subtraction constants can be matched to a low-energy theorem and radiative couplings of the 
resonances, thereby providing a model-independent framework for future analyses of high-precision kaon Primakoff data.
© The Author(s) 2021
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