New Measurement of the Anomalous Magnetic Moment of the Positive Muon
- Department of Physics, Boston University, Boston, Massachusetts 02215 (United States)
- Brookhaven National Laboratory, Upton, New York 11973 (United States)
- Budker Institute of Nuclear Physics, Novosibirsk (Russia)
- Newman Laboratory, Cornell University, Ithaca, New York 14853 (United States)
- Fairfield University, Fairfield, Connecticut 06430 (United States)
- Physikalisches Institut der Universitaet Heidelberg, 69120 Heidelberg (Germany)
- Physics Department, University of Illinois at Urbana-Champaign, Urbana-Champaign, Illinois 61801 (United States)
- MPI fuer Medizinische Forschung, 69120 Heidelberg (Germany)
- KEK, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801 (Japan)
- Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
The muon anomalous magnetic moment has been measured in a new experiment at Brookhaven. Polarized muons were stored in a superferric ring, and the angular frequency difference, {omega}{sub a} , between the spin precession and orbital frequencies was determined by measuring the time distribution of high-energy decay positrons. The ratio R of {omega}{sub a} to the Larmor precession frequency of free protons, {omega}{sub p} , in the storage-ring magnetic field was measured. We find R=3.707thinsp220(48){times}10{sup {minus}3} . With {mu}{sub {mu}}/{mu}{sub p}=3.183thinsp 345thinsp47(47) this gives a{sub {mu}{sup +}}=1thinsp165thinsp 925(15){times}10{sup {minus}9} ({plus_minus}13 ppm ), in good agreement with the previous CERN measurements for {mu}{sup +} and {mu}{sup {minus}} and of approximately the same precision. {copyright} {ital 1999} {ital The American Physical Society}
- OSTI ID:
- 328574
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 8 Vol. 82; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English