Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9857436 | Nuclear Physics B - Proceedings Supplements | 2005 | 6 Pages |
Abstract
The evaluation of the hadronic contribution to the niuon magnetic anomaly aμ is reviewed, including a new estimate using precise results on the Ï+Ïâ spectral function from the KLOE Collaboration. It is found that the KLOE data confirm to some extent the previous e+eâ annihilation data in this channel, and accentuate the disagreement with the isospin-breaking-corrected spectral function from ÏââÏ+Ï0Î½Ï decays. Correcting for the empirical difference in the mass of the charged and the neutral Ï locally improves, but does not resolve this discrepancy. A preliminary reevaluation (including the KLOE data) of the e+eâ-based Standard Model prediction of aμ results in a deviation of 2.7 standard deviations from the BNL measurement.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Michel Davier,