Initial Study of Hadronic Energy Resolution in the Analog HCAL and the Complete CALICE Setup

The hadronic energy resolution of the CALICE analog hadron calorimeter and of the complete CALICE setup, consisting of a SiW electromagnetic calorimeter, an analog scintillator- steel hadron calorimeter and an analog scintillator-steel tail catcher, has been studied using data taken in 2007 at CERN. To optimize the energy resolution for single hadrons by taking advantage of the high granularity and segmentation of these calorimeters, a simple signal weighting procedure based on the density of deposited energy in each cell is studied. These initial studies yield a stochastic term of the resolution of approximately 50%/$\sqrt{E}$ in the case of the HCAL stand alone and for the complete setup. This corresponds to an improvement of roughly 25% and 18% compared to the resolution obtained without density dependent weighting for the HCAL and the complete setup, respectively.