Speaker
Please give a brief summary of your poster
CMS is one of the general purpose experiments of the Large Hadron Collider (LHC). The parameters of the particles of the collisions will be measured there with high precision. The purpose of the hadronic calorimeter (hcal) is mainly the determination of the energy of hadronic particles. It is a sampling calorimeter which implies a worsening of its linearity and energy resolution.
For the CMS detector upgrade a longitudinal segmentation of the hcal towers is planned. Therefore it is possible to resolve single parts of particle showers. This allows to establish a weighting method with the goal to distinguish between electromagnetic a hadronic energy depositions and thereby to improve its linearity and energy resolution by an adequate weighting. The energy density (energy per volume) is thereby the criteria for the differentiation between electromagnetic or rather hadronic energy depositions. Electromagnetic energy depositions e.g. tend to higher energy densities and would consequently get smaller weights.
Here studies of a method based on tabulated weights are presented. Weights as a function of the energy density have been obtained for simulated test beam data with several energies. These weights are applied to simulated data to investigate the improvement of the linearity and energy resolution of the upgraded CMS barrel calorimeter. By this means different readout designs can be examined to find the optimal configuration of the planned segmentation. The investigation of shower profiles and the fraction of electromagnetic and hadronic energy depositions helps to understand and to establish the method.
