Data-driven hadronic interaction model for atmospheric lepton flux calculations

The leading contribution to the uncertainties of atmospheric neutrino flux calculations arise from cosmic-ray nucleon and production cross sections secondary particles in hadron-air interactions. data-driven model developed this work parametrizes particle yields fixed-target accelerator data. propagation errors data inclusive muon predictions results smaller than previous estimates, description is good. implemented as part MCEq package, hence can be flexibly employed for theoretical error estimation at telescopes.