Muon g-2 experiment at Brookhaven National Laboratory

By the end of an excellent data taking in 1999, we collected ≈ 1 billion decay positrons with energy greater than 2 GeV and 30 μs after injection. The analysis of the 1999 data set were performed in parallel by various teams in the collaboration and each team provides a different approach to the analysis. The projected errors are expected to be of order 1.3 ppm statistical and below 0.5 ppm systematic. The data obtained in the 2000 run contains ≈ 4 times more decay positrons compared to 1999.