Silvia Franchino Universita Pavia IFAE09 Bari - 15/04/09 2 DREAM = Dual REAdout Method Performances of hadronic calorimeters limited by fluctuations in em fraction (f em ) DREAM measures f em event by event by separating the Scintillation & Cherenkov lights to improve performances of Hcal for next generation hep experiments Scintillation light (S) created by every charged particle Cherenkov light (C) created by relativistic particles (em component of the shower ) C/S ratio --> correlated to f em We started the dual readout approach with Fiber calorimeter, Now we are trying to extend the method to Homogeneous materials (PbWO4, BGO) to gain with number of C photons, sampling fluctuations How separate C, S in homogeneous materials: Effects of corrections
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