Abstract
A proposal to Fermilab, P989, has the goal to improve on the precision of the muon anomalous magnetic moment, a μ = ( g μ − 2 ) / 2 by at least a factor of 4 beyond the 0.54 ppm relative precision obtained in E821 at Brookhaven. The precision storage ring will be moved to Fermilab and installed in a new building. A new 8 GeV/c proton beamline and 3.1 GeV/c muon beamline will be built. The unique capabilities of Fermilab to produce a proton beam with pulses containing ≃ 1 × 10 12 protons at an advantageous duty factor will provide the necessary increase of statistics in a reasonable running time. This new experiment should clarify the apparent difference between the experimental and Standard-Model values of a μ .
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