First results from the new muon (g-2) experiment
- Department of Physics, Boston University, Boston, Massachusetts 02215 (United States)
- Brookhaven National Laboratory, Upton, New York 11973 (United States)
- 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)
- MPI fuer Med. Forschung, 69120 Heidelberg (Germany)
- Department of Physics, University of Illinois, Urbana, Illinois 61820 (United States)
- Department of Physics, University of Minnesota, Minneapolis, Minnesota 55455 (United States)
- Budker Institute of Nuclear Physics, Novosibirsk (Russia)
- KEK (Japan)
- Tokyo Institute of Technology, Tokyo (Japan)
- Department of Physics, Yale University, New Haven, Connecticut 06511 (United States)
A new and improved experiment for measuring the muon magnetic anomaly at the Brookhaven National Laboratory (BNL) was successfully started and has yielded first results. New major components of the experiment include a superferric storage ring, a superconducting inflector, electrostatic quadrupoles, lead-scintillating fiber electron calorimeters and a high precision NMR magnetic field measurement and control system. The first measurement of the ratio R of the spin precession frequency of the positive muon relative to that of a free proton gives R=(3.707 219{plus_minus}0.000 048){times}10{sup {minus}3}. It is similar in accuracy and in good agreement with previous CERN measurements for {mu}{sup +} and {mu}{sup {minus}}. A muon kicker has been installed to boost the number of stored particles in the storage ring magnet and was successfully commissioned recently. The data acquired so far is expected to lower significantly the uncertainty in {ital R}. First extensive data-taking will start soon. {copyright} {ital 1999 American Institute of Physics.}
- OSTI ID:
- 348244
- Report Number(s):
- CONF-980894--; CONF-980843--
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 457; ISSN 0094-243X; ISSN APCPCS
- Country of Publication:
- United States
- Language:
- English
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