New g-2 Measurement to be Announced at Brookhaven Lab

January 2, 2004

Note: This colloquium will be webcast live in RealPlayer format.

WHAT: Physicists from an international collaboration investigating how the spin of a muon is affected as this type of subatomic particle moves through a magnetic field - a value known as "muon g-2," which is a very sensitive test of the validity of the Standard Model of particle physics - will present their latest precision measurement at a special colloquium at the U.S. Department of Energy's Brookhaven National Laboratory, where the experiment was conducted.

WHEN: Thursday, January 8, 2004, 11 a.m.

WHERE: Physics Building, Brookhaven National Laboratory, Upton, NY (1.5 miles north of Exit 68 on the Long Island Expressway). See link to detailed maps and directions below.

DETAILS: The Standard Model of particle physics is an overall theory of particles and forces that has withstood experimental challenge for some 30 years. In February 2001, and again in July 2002, the muon g-2 collaboration - an international collaboration of scientists from Brookhaven Lab and 11 other institutions in the U.S., Russia, Japan, The Netherlands, and Germany - published findings that deviated significantly from the values predicted by the Standard Model. These results generated intense interest within the physics community as possible indications that the Standard Model might be incomplete. The newest result, based on the group's most recent data-collection run, is the first measure of the g-2 value for negatively charged muons. Physicists are anxious to see if it agrees with the prior results for positively charged muons, and how it compares with the value predicted by theory.

2004-10132  |  INT/EXT  |  Newsroom