Sub-TeV hadronic interaction model differences and their impact on air showers

In the sub-TeV regime, most widely used hadronic interaction models disagree significant lying their predictions for post-first and ground-level particle spectra from cosmic ray induced air showers. These differences generate an important source of systematic uncertainty in experimental use. We investigate nature impact model uncertainties through a simultaneous analysis ground level particles first scenarios. focus on shower primaries with energies close to transition between high low energy models, where dissimilarities have been shown be largest well within range accelerator measurements. Interaction are diverge as several scenarios compared, reflecting intrinsic theoretical frameworks. Finally, we discuss importance interactions regime switching occurs (<1 TeV) effect choice number showers higher energies.