Full Simulation Studies of the Silicon Tracker for the Linear Collider Detector ∗

A central tracker based on silicon microstrip sensors has been envisaged for the e + e − linear collider experiments. A full simulation program based on GEANT4 has been developed to study performance of the tracker. We report some preliminary results obtained using this program. The use of silicon microstrip detectors as precise tracking devices in colliding-beam experiments has been well established. The silicon microstrip detector is used as a vertex detector mounted immediately outside the beam pipe to reconstruct the decay vertices of short-lived particles. The robustness of the silicon vertex detector against beam backgrounds has also been demonstrated. At the SLAC Linear Collider (SLC) experiment, excessive occupancy due to the accelerator originated backgrounds in the central tracking drift chamber limited its operation. Because the anticipated accelerator-induced background of the future e + e − linear collider (LC) is severer than that of SLC, the silicon microstrip detector has emerged as a promising candidate for a central tracking device. In this report, we summarize preliminary results obtained based on a full simulation of the silicon microstrip central tracker. For the detector configuration, we use the parameters considered for the NLC SD silicon tracker[1], consisting of five