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Title: The Muon g-2 experiment at Fermilab

Conference ·
 [1]
  1. Boston U.
+ Show Author Affiliations

Precision measurements of the anomalous magnetic moment of the muon a are a stringent test of the Standard Model. The last measurement of a at Brookhaven National Laboratory (BNL) diers from the Standard Model prediction by 3-4: a possible indication of new physics. A successor to that experi- ment has been constructed at Fermilab, with the aim of reducing the experimental uncertainty by a factor of four to 140 ppb. The measurement technique continues to use the storage ring concept from BNL, with muons circulating in a highly uni- form magnetic dipole eld. The spin precession frequency is extracted by analysing the modulation of the rate of higher-energy positrons from muon decays, which are detected by 24 calorimeters around the inside of the ring. Compared to the previous experiment, signicant improvements have been made in the areas of muon beam preparation, storage ring hardware, eld measuring equipment, and detector and electronics systems. In these proceedings, I report on the status of the experiment as of June 2018, presenting an overview of the experiment's progress, some initial data from the rst run, and the anticipated timeline for a new result.

Research Organization:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Contributing Organization:
Muon g-2
DOE Contract Number:
AC02-07CH11359
OSTI ID:
1478011
Report Number(s):
FERMILAB-CONF-18-364-PPD; 1696784
Resource Relation:
Journal Volume: 287-288
Country of Publication:
United States
Language:
English

References (16)

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journal July 2015
Studies of an array of PbF2 Cherenkov crystals with large-area SiPM readout
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Measurement of the e + e − → π + π − cross section between 600 and 900 MeV using initial state radiation conference June 2020
Search for the dark photon in π 0 decays journal June 2015
Final report of the E821 muon anomalous magnetic moment measurement at BNL journal April 2006
CODATA recommended values of the fundamental physical constants: 2010 journal November 2012
New Measurement of the Electron Magnetic Moment and the Fine Structure Constant journal March 2008
High Precision Measurements of the Ground State Hyperfine Structure Interval of Muonium and of the Muon Magnetic Moment journal January 1999
Complete Tenth-Order QED Contribution to the Muon g − 2 journal September 2012
Reevaluation of the hadronic contributions to the muon g−2 and to $\alpha (M^{2}_{Z})$ journal January 2011
( g − 2) μ and α( M 2 Z ) re-evaluated using new precise data journal June 2011
The electroweak contributions to ( g − 2 ) μ after the Higgs-boson mass measurement journal September 2013
Final report of the E821 muon anomalous magnetic moment measurement at BNL journal April 2006
High Precision Measurements of the Ground State Hyperfine Structure Interval of Muonium and of the Muon Magnetic Moment journal January 1999
Measurement of the e+e−→π+π− cross section between 600 and 900 MeV using initial state radiation journal February 2016

Cited By (8)

Supersymmetry and LHC missing energy signals journal December 2018
Revised and improved value of the QED tenth-order electron anomalous magnetic moment journal February 2018
Vectorlike leptons: Muon g − 2 anomaly, lepton flavor violation, Higgs boson decays, and lepton nonuniversality journal July 2017
Dark sectors at the Fermilab SeaQuest experiment journal August 2018
Numerical calculation of the full two-loop electroweak corrections to muon ( g − 2 ) journal April 2019
Muon anomalous magnetic moment in the standard model extension journal December 2017
Dark matter interactions with muons in neutron stars journal August 2019
g − 2 of charged leptons, α ( M Z 2 ) , and the hyperfine splitting of muonium journal January 2020

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