Rapid 3d Track Reconstruction With The Babar Trigger Upgrade

Rapid 3D Track Reconstruction with the BaBar Trigger Upgrade

A new hardware trigger system based on tracks detected by a stereo drift chamber has been developed for the BABAR experiment at the Stanford Linear Accelerator Center. The z0 p{sub T} Discriminator (ZPD) is capable of fast, 3-dimensional reconstruction of charged particle tracks and provides rejection of background events due to beam particles interacting with the beam pipe at the first-level trigger. Over 1 gigabyte of data is processed per second by each ZPD module. Rapid track reconstruction has been realized using Xilinx Virtex-II FPGAs.

2003 IEEE Nuclear Science Symposium

A Measurement of the CP Parameter Sin2β Using Fully Reconstructed B -> Cc̄ Decays at the BaBar Experiment