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The (g-2) value of the negative muon was announced January 8, 2004!

Our paper (.ps,.pdf) based on the 2001 data set has been published in Physical Review Letters 92; 1618102 (2004).
Read the BNL Press Release of Thursday, January 8, 2004 here.
The webcast of the announcement may be found on this page.  

The Muon (g-2) Experiment at Brookhaven National Laboratory  is stringently testing the Standard Model by measuring the Anomalous Magnetic Moment of the Muon to unprecedented precision.

The experiment is run by an international collaboration of more than 60 physicists from 11 institutes in the United States, Germany, The Netherlands, Russia and Japan. 

To learn about the physics of the g-2 measurement, click here.