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This paper discusses the hadronic energy reconstruction of two combinedelectromagnetic and hadronic calorimeter systems using physics prototypes ofthe CALICE collaboration: the silicon-tungsten electromagnetic calorimeter(Si-W ECAL) and the scintillator-SiPM based analog hadron calorimeter (AHCAL);and the scintillator-tungsten electromagnetic calorimeter (ScECAL) and theAHCAL. These systems were operated in hadron beams at CERN and FNAL, permittingthe study of the performance in combined ECAL and HCAL systems.  Two techniques for the energy reconstruction are used, a standardreconstruction based on calibrated sub-detector energy sums, and one based on asoftware compensation algorithm making use of the local energy densityinformation provided by the high granularity of the detectors. The softwarecompensation-based algorithm improves the hadronic energy resolution by up to30% compared to the standard reconstruction. The combined system data showcomparable energy resolutions to the one achieved for data with showersstarting only in the AHCAL and therefore demonstrate the success of theinter-calibration of the different sub-systems, despite of their differentgeometries and different readout technologies.

Energy Reconstruction of Hadrons in highly granular combined ECAL and HCAL systems