Kaon Decay Form Factors and Atmospheric Neutrino Flavor Ratio at High   Energies
  The dependence of the semileptonic kaon decay form factors on the 4-momentum transfer to the lepton pair causes certain changes in the differential decay rates and, hence, it should affect the conventional atmospheric neutrino flux and neutrino flavour ratio. As a case in point, we included these rates into the calculation of the atmospheric neutrino flux at energies 1 to 100 TeV.   The calculated neutrino spectra are between the earlier predictions while the neutrino flavor ratio, R, is somewhat affected by the kaon form factors. The R proves to be very sensitive to the contribution of neutrinos from decay of charmed particles, providing an additional method to test the charm production models in future experiments with large-volume neutrino telescopes. 
V. A. Naumov (1 and 2), T. S. Sinegovskaya (1) and S. I. Sinegovsky   (1) ((1) Physics Faculty, Irkutsk State University, Ir...