Dual readout calorimeter with heavy scintillating crystal fibers

High precision measurement of hadrons and jet energy and momentum is one of the main challenges for detectors at future high energy collider experiments. Currently, two approaches are considered to achieve this goal. In the particle flow approach (PFA), a complex highly segmented calorimeter system is required to identify and to track all particles in a jet. On the other hand the dual readout recording of both scintillation and Cerenkov light in an active medium allows extracting the electromagnetic fraction of the total shower energy on an event by event basis. Recent progress in heavy scintillating fiber crystal production methods offer interesting perspectives for the design of a homogeneous but finely structured calorimeter based on the dual readout principle. This paper reports on recent developments in the production of heavy scintillating crystal fibers. It presents a calorimeter concept based on such technology that allows for a simultaneous high precision measurement of the complete set of shower parameters such as the direction, the spatial distribution of the energy deposition and its composition in terms of electromagnetic, charged and neutral hadrons content.