Track segments in hadronic showers in a highly granular scintillator-steel hadron calorimeter

c CERN 2013 for the benefit of the CALICE collaboration, published under the terms of the Creative Commons Attribution 3.0 License by IOP Publishing Ltd and Sissa Medialab srl. Any further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation and DOI. ABSTRACT: We investigate the three dimensional substructure of hadronic showers in the CAL-ICE scintillator-steel hadronic calorimeter. The high granularity of the detector is used to find track segments of minimum ionising particles within hadronic showers, providing sensitivity to the spatial structure and the details of secondary particle production in hadronic cascades. The multiplicity, length and angular distribution of identified track segments are compared to GEANT4 simulations with several different shower models. Track segments also provide the possibility for in-situ calibration of highly granular calorimeters.tion of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc); Analysis and statistical methods