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New measurement of the anomalous magnetic moment of the positive muon
New measurement of the anomalous magnetic moment of the positive muon
- Source :
- Physical Review Letters, Scopus-Elsevier
- Publication Year :
- 1999
-
Abstract
- 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}
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Physical Review Letters, Scopus-Elsevier
- Accession number :
- edsair.doi.dedup.....33e80887a6a1607114e0384c1ebd10b6