A 3-Dimensional Atmospheric Neutrino Flux Calculation

A full 3-dimensional code has been developed within the framework of the Bartol atmospheric neutrino flux calculations [1,2], which until now have been made in the one-dimensional approximation. Bending of primaries and secondaries within a realistic geomagnetic field is included. The ultimate goal is to provide a new set of neutrino fluxes for use in interpretation of measurements of atmospheric neutrinos [3,4] and derivation of oscillation parameters. Here we mention some features of the calculational scheme and use it to illustrate the basic features of a three-dimensional calculation.