2006/11/14 by David W. Hertzog
Computer Science · Physics and Astronomy · #Annihilation #Computational Physics and Python Applications #Constraint (computer-aided design) #Interpretation (philosophy) #Muon #Neutrino Physics Research #Particle physics theoretical and experimental studies #Physics beyond the Standard Model #Reduction (mathematics) #Standard Model (mathematical formulation) #Work (physics) #hep-ex
paper · pdf · doi:10.1016/j.nuclphysbps.2007.03.032
published as Nucl.Phys.Proc.Suppl.169:255-264,2007 · Invited Talk, Tau-06 Workshop, 10 pages, 5 figures
arxiv created 2006/11/14 · openalex publication_date 2007/06/26 · arxiv updated 2009/12/01 · openalex created_date 2019/06/27 · openalex updated_date 2026/08/05
New final results from the CMD-2 and SND e+e- annihilation experiments, together with radiative return measurements from BaBar, lead to recent improvements in the standard model prediction for the muon anomaly. The uncertainty at 0.48 ppm--a largely data-driven result--is now slightly below the experimental uncertainty of 0.54 ppm. The difference, amu(expt)- amu(SM) = (27.6 +/- 8.4) x 10-10, represents a 3.3 standard deviation effect. At this level, it is one of the most compelling indicators of physics beyond the standard model and, at the very least, a major constraint for speculative new theories such as SUSY or extra dimensions. Others at this Workshop detailed further planned standard model theory improvements to amu. Here I outline how BNL E969 will achieve a factor of 2 or more reduction in the experimental uncertainty. The new experiment is based on a proven technique and track record. I argue that this work must be started now to have maximal impact on the interpretation of the new physics anticipated to be unearthed at the LHC.