The Muon (g-2) Theory Value: Present and Future

By T. Blum, A. Denig, I. Logashenko, E. Rafael, B. Roberts, T. Teubner, G. Venanzoni. 2013

153 citations recorded by the source corpus.

This White Paper briefly reviews the present status of the muon (g-2) Standard-Model prediction. This value results in a 3 - 4 standard-deviation difference with the experimental result from Brookhaven E821. The present experimental uncertainty is ±63×10−11 (0.54~ppm), and the Standard-Model uncertainty is ≃±49×10−11. Fermilab experiment E989 has the goal to reduce the experimental error to ±16×10−11. Improvements in the Standard-Model value, which should be achieved between now and when the first results from Fermilab E989 could be available, should lead to a Standard-Model uncertainty of ~±35×10−11. These improvements would halve the uncertainty on the difference between experiment and theory, and should clarify whether the current difference points toward New Physics, or to a statistical fluctuation. At present, the (g-2) result is arguably the most compelling indicator of physics beyond the Standard Model and, at the very least, it represents a major constraint for speculative new theories such as supersymmetry, dark gauge bosons or extra dimensions.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/d18c72dd4768473131a8a7d54e6e37dd5be4c7f7

Citations in the corpus

• Low-energy effective field theory below the electroweak scale: operators and matching (2017, unknown): “o the non-linear terms are negligible. In Eq. (6.21), we have used the experimental uncertainty on muon g−2 as the limit on ReLeγ µµ . The current discrepancy between experiment and the SM prediction [68] corresponds to ReLeγ µµ ≈(20 ±6) ×10−10 GeV−1. The Lagrangian coefficients at µ= mbare related to”