ar X iv : h ep - p h / 93 04 21 5 v 1 5 A pr 1 99 3 BA - 93 - 07 Calculated Electron Fluxes at Airplane Altitudes
نویسنده
چکیده
A precision measurement of atmospheric electron fluxes has been performed on a Japanese commercial airliner (Enomoto, et al., Ref. [1]). The bulk of these electrons are produced in pairs from the gamma rays emitted when π0s decay, which in turn have been produced in cosmic ray-air nucleus collisions. These electron fluxes can be used to test elements of our atmospheric neutrino flux calculation, i.e., the assumed primary spectrum and the monte carlo shower code. Here we have modified the monte carlo program which had previously been used to calculate the fluxes of atmospheric neutrinos by combining it with the program GEANT to compute the electromagnetic part of the shower. This hybrid program now keeps track of the electrons produced in cosmic ray showers as a function of energy and atmospheric depth. We compare our calculated integral fluxes above the experimental threshold energies 1 GeV, 2 GeV, and 4 GeV for a variety of atmospheric depths and cutoff rigidities. Our results are in good agreement (∼ a few %) with the data, but we found we needed to boost the normalization of the primary flux by 12% over the value we had previously used to calculate the atmospheric neutrino flux.
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