Next Generation Muon g-2 Experiments

Abstract

I report on the progress of two new muon anomalous magnetic moment experiments, which are in advanced design and construction phases. The goal of Fermilab E989 is to reduce the experimental uncertainty of $a_{\mu }$ from Brookhaven E821 by a factor of 4; that is, $\delta a_{\mu }\sim 16\times 10^{-11}$, a relative uncertainty of 140~ppb. The method follows the same magic-momentum storage ring concept used at BNL, and pioneered previously at CERN, but muon beam preparation, storage ring internal hardware, field measuring equipment, and detector and electronics systems are all new or upgraded significantly. In contrast, J-PARC E34 will employ a novel approach based on injection of an ultra-cold, low-energy, muon beam injected into a small, but highly uniform magnet. Only a small magnetic focusing field is needed to maintain storage, which distinguishes it from CERN, BNL and Fermilab. E34 aims to roughly match the previous BNL precision in their Phase~1 installation.

8 pages, 5 figures, 2 tables, Invited talk given at the FCCP 2015 Workshop

References in corpus (3)

• Leading-order hadronic contribution to the electron and muon g-2
• Studies of an array of PbF2 Cherenkov crystals with large-area SiPM readout
• Test of candidate light distributors for the muon (g$-$2) laser calibration system

Cited by in corpus (13)

• Physics of leptoquarks in precision experiments and at particle colliders
• Muon g-2 Theory: the Hadronic Part
• On the precision of a data-driven estimate of hadronic light-by-light scattering in the muon g-2: pseudoscalar-pole contribution
• Lattice calculation of the pion transition form factor ${\pi }^0\to {\gamma }^{\ast }{\gamma }^{\ast }$
• Etaprime and Eta Mesons with Connection to Anomalous Glue
• Electrophobic Scalar Boson and Muonic Puzzles
• Probing the muon g-2 anomaly with the Higgs boson at a Muon Collider
• Experimental constraints on the second clock effect
• Exploratory studies for the position-space approach to hadronic light-by-light scattering in the muon $g-2$
• Accelerator performance analysis of the Fermilab Muon Campus
• The laser-based gain monitoring system of the calorimeters in the Muon $g-2$ experiment at Fermilab
• Geant4 simulations of the lead fluoride calorimeter
• Subleading hadronic vacuum polarization contributions to muon $g-2$: ${\mu }^{+}{\mu }^{-}\to {\gamma }^{\ast }\to {\pi }^0{\gamma }^{\ast }$