Mini-jets seen in cosmic-ray interaction with carbon target chamber

In this work we use two differents procedures for mini-jet identification in cosmic-ray particle interaction with carbon target chamber (C-jets) observed by Brazil-Japan Collaboration. These events concern the overlapping energy region with CERN and FNAL collider experiments (\(\sqrt s \) \R} 500 GeV). Our results are discussed and interpreted in terms of fireball model and we find that those studies have many aspects in common with the modern version of multiparticle production models such as quark string inspired by QCD.