Lawrence Gibbons

About

Lawrence Gibbons is a Professor in the Department of Physics at Cornell University, with a focus on experimental elementary particle physics. His research centers on precision measurements of fundamental parameters in particle physics, particularly through the ongoing 'g-2' experiment at Fermilab, which aims to determine the anomalous magnetic moment of the muons with a precision of approximately 0.1 parts per million. This measurement is sensitive to contributions from new fundamental particles outside of the Standard Model and provides constraints on Beyond Standard Model processes, especially in relation to particles that could be observed at the Large Hadron Collider. Gibbons is involved in various aspects of the experiment, including work with the detectors used to measure daughter electrons from muon decays, and he collaborates with colleagues such as Dave Rubin, who brings accelerator physics expertise. His work offers students the opportunity to participate in all stages of a modern high-energy physics experiment.

Research topics

• Nuclear physics
• Physics
• Particle physics
• Condensed matter physics
• Quantum mechanics
• Optics
• Astronomy

Selected publications

• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm

  Physical Review Letters · 2021 · 1322 citations

  We present the first results of the Fermilab National Accelerator Laboratory (FNAL) Muon g -2 Experiment for the positive muon magnetic anomaly a g -2=2. The anomaly is determined from the precision measurements of two angular frequencies. Intensity variation of high-energy positrons from muon decays directly encodes the difference frequency a between the spin-precession and cyclotron frequencies for polarized muons in a magnetic storage ring. The storage ring magnetic field is measured using nu…

  PublisherOA PDFDOI

• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.20 ppm

  Physical Review Letters · 2023 · 365 citations

  We present a new measurement of the positive muon magnetic anomaly, a_{μ}≡(g_{μ}-2)/2, from the Fermilab Muon g-2 Experiment using data collected in 2019 and 2020. We have analyzed more than 4 times the number of positrons from muon decay than in our previous result from 2018 data. The systematic error is reduced by more than a factor of 2 due to better running conditions, a more stable beam, and improved knowledge of the magnetic field weighted by the muon distribution, ω[over ˜]_{p}^{'}, and o…

  PublisherOA PDFDOI

• Measurement of the anomalous precession frequency of the muon in the Fermilab Muon<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>g</mml:mi><mml:mo>−</mml:mo><mml:mn>2</mml:mn></mml:math>Experiment

  Physical review. D/Physical review. D. · 2021 · 196 citations

  The Muon g -2 Experiment at Fermi National Accelerator Laboratory (FNAL) has measured the muon anomalous precession frequency m a to an uncertainty of 434 parts per billion (ppb), statistical, and 56 ppb, systematic, with data collected in four storage ring configurations during its first physics run in 2018. When combined with a precision measurement of the magnetic field of the experiment's muon storage ring, the precession frequency measurement determines a muon magnetic anomaly of a FNAL 116…

  PublisherOA PDFDOI

• Magnetic-field measurement and analysis for the Muon <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>g</mml:mi><mml:mo>−</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:math> Experiment at Fermilab

  Physical review. A/Physical review, A · 2021-04-07 · 103 citations

  articleOpen access

  The Fermi National Accelerator Laboratory (FNAL) Muon g-2 Experiment has measured the anomalous precession frequency a (g -2)/2 of the muon to a combined precision of 0.46 parts per million with data collected during its first physics run in 2018. This paper documents the measurement of the magnetic field in the muon storage ring. The magnetic field is monitored by systems and calibrated in terms of the equivalent proton spin precession frequency in a spherical water sample at 34.7 C. The measur…

  PublisherOA PDFDOI

• Detailed report on the measurement of the positive muon anomalous magnetic moment to 0.20 ppm

  Physical review. D/Physical review. D. · 2024-08-08 · 53 citations

  articleOpen access

  We present details on a new measurement of the muon magnetic anomaly, <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>a</a:mi><a:mi>μ</a:mi></a:msub><a:mo>=</a:mo><a:mo stretchy="false">(</a:mo><a:msub><a:mi>g</a:mi><a:mi>μ</a:mi></a:msub><a:mo>−</a:mo><a:mn>2</a:mn><a:mo stretchy="false">)</a:mo><a:mo>/</a:mo><a:mn>2</a:mn></a:math>. The result is based on positive muon data taken at Fermilab’s Muon Campus during the 2019 and 2020 accelerator runs. The measur…

  PublisherOA PDFDOI

Recent grants

• MRI Consortium: Development of Instrumentation to Measure the Spin Precession Frequency in the Fermilab Muon g-2 Experiment

  NSF · $867k · 2013–2017

Frequent coauthors

• D. Blöch

  Institut Pluridisciplinaire Hubert Curien

  1284 shared

• J. Andreä

  Institut Pluridisciplinaire Hubert Curien

  1283 shared

• E. Conte

  Institut Pluridisciplinaire Hubert Curien

  1283 shared

• C. Collard

  Institut Pluridisciplinaire Hubert Curien

  1235 shared

• P. Verdier

  Institute of High Energy Physics

  1080 shared

• M. Lethuillier

  Institute of Nuclear Physics of Lyon

  1079 shared

• S. Perriès

  Institute of Nuclear Physics of Lyon

  1043 shared

• V. Sordini

  Institute of Nuclear Physics of Lyon

  1035 shared

Labs

• Lawrence GibbonsPI

Education

• PhD, Physcs

  University of Chicago

Awards & honors

• Three professors elected as APS fellows

Similar researchers at Cornell University

• Michael Niemackh-76
• Yuval Grossmanh-73
• Eric Dufresneh-69