What The KE4 Decay Tells Us On A Value Of -Particle Mass And On A Nature Of The Spin-1 Mesons
Abstract
The data on the form factors of the Ke4 decay permit to fix a value of the non-specified in the theory parameter entering in the lagrangian of the system of 0+ and 0- mesons . Then, for a mass of the lightest σ-meson we find: mσ=663 MeV. As for a nature of the spin-1 mesons, also contributing into Ke4 form factors, the data do not allow to interpret them as the gauge bosons of the chiral theory.
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