Development of a semi-digital hadronic calorimeter using GRPC

A new generation of high granularity hadronic calorimeters was proposed recently to apply efficiently the so-called particle flow algorithms (PFA) techniques that aim to improve on jet energy resolution in the future International Linear Collider experiments. We present a new development on a gaseous hadronic calorimeter using glass resistive plate chambers as sensitive medium with a semi-digital readout. A small prototype was built and successfully tested at CERN. To build a large ILC-like protot ype, an intensive development is ongoing. Preliminary results are very encouraging.