High Energy Physics Seminar: Dr. Joseph Grange, Argonne National Laboratory  Add To Calendar

  • Date(s): Tuesday, 3/31 1:30 PM to Tuesday, 3/31 2:30 PM
  • Speaker: Dr. Joseph Grange
  • Host: Zhenyu Ye
  • Campus Address: 2214 SES (Science Engineering South)

Title: Magnetic field determination to 70 ppb in the new g-2 experiment at Fermilab
Abstract: While the Standard Model of particle physics has been enormously successful in describing the breadth of both modern and historical experiments, there are many open questions regarding its fundamental efficacy.  Precision experiments of fundamental quantities such as a particle's magnetic moment afford an opportunity to test the Standard Model prediction, where significant deviations from its expectation could be the first evidence of new physics processes that could ultimately unite the fundamental forces of nature.  The measurement of the muon's anomalous magnetic moment at Brookhaven National Laboratory found an intriguing discrepancy of more than three standard deviations with the Standard Model prediction.  The precision of the measurement was dominated by the collected statistics and so the community immediately began searching for a new home to execute an improved determination.  This effort is now being realized down the road at Fermilab, where new muon beamlines are being developed to deliver over 20 times the statistics observed by the Brookhaven experiment.  To fully exploit this enormous statistical power, systematic uncertainties in determining the precession of the muon spin vector and the magnetic field in the storage ring must also be significantly improved.  The latter topic is the focus of this presentation. 

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