A precise measurement of the anomalous g value, aμ+ = (g - 2)/2, for the positive muon has been made at the Brookhaven Alternating Gradient Synchrotron. The result aμ+ = 11 659 202(14)(6) × 10-10 (1.3 ppm) is in good agreement with previous measurements and has an error one third that of the combined previous data. The current theoretical value from the standard model is aμ(SM)= 11 659 159.6(6.7) × 10-10 (0.57 ppm) and aμ(exp)-aμ(SM) = 42(16) × 10-10 in which aμ(exp) is the world average experimental value.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics