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Measurement of the Positive Muon Anomalous Magnetic Moment to 0.20 ppm
D. P. Aguillard, T. Albahri, D. Allspach +188
We present a new measurement of the positive muon magnetic anomaly, , from the Fermilab Muon Experiment using data collected in 2019 and 2020. We ha…
Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm
B. Abi, T. Albahri, S. Al-Kilani +234
We present the first results of the Fermilab Muon g-2 Experiment for the positive muon magnetic anomaly . The anomaly is determined from the precision measurem…
Magnetic Field Measurement and Analysis for the Muon g-2 Experiment at Fermilab
T. Albahri, A. Anastasi, K. Badgley +170
The Fermi National Accelerator Laboratory has measured the anomalous precession frequency of the muon to a combined precision of 0.46 parts per million with…
Charged Leptons
J. Albrecht, M. Artuso, K. Babu +34
This is the report of the Intensity Frontier Charged Lepton Working Group of the 2013 Community Summer Study "Snowmass on the Mississippi", summarizing the current status and futur…
MuLan Measurement of the Positive Muon Lifetime and Determination of the Fermi Constant
T. P. Gorringe
We report results from the MuLan measurement of the positive muon lifetime. The experiment was conducted at the Paul Scherrer Institute using a time-structured surface muon beam an…
Detailed Report of the MuLan Measurement of the Positive Muon Lifetime and Determination of the Fermi Constant
V. Tishchenko, S. Battu, R. M. Carey +30
We present a detailed report of the method, setup, analysis and results of a precision measurement of the positive muon lifetime. The experiment was conducted at the Paul Scherrer…
Searching for physics beyond the Standard Model through the dipole interaction
B. Lee Roberts
The magnetic dipole interaction played a central role in the development of QED, and continued in that role for the Standard Model. The muon anomalous magnetic moment has served as…
Measurement of the Positive Muon Lifetime and Determination of the Fermi Constant to Part-per-Million Precision
D. M. Webber, V. Tishchenko, Q. ~Peng +30
We report a measurement of the positive muon lifetime to a precision of 1.0 parts per million (ppm); it is the most precise particle lifetime ever measured. The experiment used a t…
Precision Searches for Physics Beyond the Standard Model
B. Lee Roberts
The "precision" frontier, which is closely related to the "intensity" frontier, provides a complementary path to the discovery of physics beyond the Standard Model. Several example…
An Improved Limit on the Muon Electric Dipole Moment
G. W. Bennett, B. Bousquet, H. N. Brown +73
Three independent searches for an electric dipole moment (EDM) of the positive and negative muons have been performed, using spin precession data from the muon g-2 storage ring at…
Muon Physics: A Pillar of the Standard Model
B. Lee Roberts
Since its discovery in the 1930s, the muon has played an important role in our quest to understand the sub-atomic theory of matter. The muon was the first second-generation standar…
Improved Measurement of the Positive Muon Lifetime and Determination of the Fermi Constant
MuLan Collaboration, D. B. Chitwood, T. I. Banks +38
The mean life of the positive muon has been measured to a precision of 11 ppm using a low-energy, pulsed muon beam stopped in a ferromagnetic target, which was surrounded by a scin…
Measurement of the e+e- -> pi+pi- cross section with the CMD-2 detector in the 370-520 MeV c.m. energy range
R. R. Akhmetshin, V. M. Aulchenko, V. Sh. Banzarov +50
The cross section of the process e+e- -> pi+pi- has been measured at the CMD-2 detector in the 370-520 MeV center-of-mass (c.m.) energy range. A systematic uncertainty of the measu…
High-statistics measurement of the pion form factor in the rho-meson energy range with the CMD-2 detector
2 Collaboration, R. R. Akhmetshin, V. M. Aulchenko +52
We present a measurement of the pion form factor based on e+e- annihilation data from the CMD-2 detector in the energy range 0.6<sqrt(s)<1.0 GeV with a systematic uncertainty of 0.…
Measurement of the Pion Form Factor in the Energy Range 1.04-1.38 GeV with the CMD-2 Detector
2 Collaboration, V. M. Aulchenko
The cross section for the process is measured in the c.m. energy range 1.04-1.38 GeV from 995 000 selected collinear events including 860000 events, 8200…
Muon (g-2): Past, Present and Future
B. Lee Roberts, representing the E821, E969 Collaborations
The muon (g-2) experiment E821 at the Brookhaven National Laboratory has achieved a relative precision of parts per million. A new experiment, E969, with scientific appro…
Intense Muon Physics Working Group Summary
B. Lee Roberts, Marco Grassi, Akira Sato
The intense muon beams which will be available at a neutrino factory provide a unique opportunity for searching for physics beyond the standard model, both in lepton flavor violati…
Physics at a Fermilab Proton Driver
M. G. Albrow, S. Antusch, K. S. Babu +45
This report documents the physics case for building a 2 MW, 8 GeV superconducting linac proton driver at Fermilab.
Results and Future Prospects for Muon (g-2)
B. Lee Roberts
Spin physics had its beginnings in the famous experiments of Stern and Gerlach, which eventually resulted in the postulation of spin by Goudsmit and Uhlenbeck. The Stern-Gerlach ex…
Future Muon Dipole Moment Measurements
B. Lee Roberts
From the famous experiments of Stern and Gerlach to the present, measurements of magnetic dipole moments, and searches for electric dipole moments of ``elementary'' particles have…
Study of the Processes e+ e- --> eta gamma, e+ e- --> pi0 gamma --> 3 gamma in the c.m. Energy Range 600--1380 MeV at CMD-2
CMD2 Collaboration
The processes e+ e- --> eta gamma, e+ e- --> pi0 gamma --> 3 gamma have been studied in the c.m. energy range 600--1380 MeV with the CMD-2 detector. The following branching ratios…
Lepton Dipole Moments
B. Lee Roberts
From the famous experiments of Stern and Gerlach to the present, measurements of magnetic dipole moments, and searches for electric dipole moments of ``elementary'' particles have…
A New Method For A Sensitive Deuteron EDM Experiment
Y. K. Semertzidis, M. Aoki, M. Auzinsh +35
In this paper a new method is presented for particles in storage rings which could reach a statistical sensitivity of 10**(-27) e cm for the deuteron EDM. This implies an improveme…
Reanalysis of Hadronic Cross Section Measurements at CMD-2
R. R. Akhmetshin, E. V. Anashkin, A. B. Arbuzov +42
The updated results of the precise measurements of the processes e+e-->rho->pi+pi-, e+e-->omega->pi+pi-pi0 and e+e-->phi->KLKS performed by the CMD-2 collaboration are presented. T…