A5012042546- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Muon and positron interactions and applications
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Dark Matter and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- Scientific Research and Discoveries
- Radiation Detection and Scintillator Technologies
- Particle accelerators and beam dynamics
- Computational Physics and Python Applications
- High-Energy Particle Collisions Research
- Astrophysics and Cosmic Phenomena
- NMR spectroscopy and applications
- Cholangiocarcinoma and Gallbladder Cancer Studies
- Advances in Oncology and Radiotherapy
- Magnetic Properties and Applications
- Nuclear physics research studies
- Atomic and Subatomic Physics Research
- Radiology practices and education
- TGF-β signaling in diseases
- Cancer Genomics and Diagnostics
- Nuclear Physics and Applications
- Advanced Electrical Measurement Techniques
Fermi National Accelerator Laboratory
2015-2024
University of Mississippi
2021
University of Illinois Urbana-Champaign
2007-2015
University of Washington
2013-2015
United States Department of Energy
2015
Cornell University
2015
University of Illinois System
2011-2013
The Muon g-2 Experiment at Fermi National Accelerator Laboratory (FNAL) has measured the muon anomalous precession frequency $ω_a$ 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 2018. When combined a precision measurement magnetic field experiment's ring, determines anomaly $a_μ({\rm FNAL}) = 116\,592\,040(54) \times 10^{-11}$ (0.46 ppm). This article describes...
The Fermi National Accelerator Laboratory has measured the anomalous precession frequency $a^{}_\mu = (g^{}_\mu-2)/2$ of muon to a combined precision 0.46 parts per million with data collected during its first physics run in 2018. This paper documents measurement magnetic field storage ring. is monitored by nuclear resonance systems and calibrated terms equivalent proton spin spherical water sample at 34.7$^\circ$C. weighted distribution resulting $\tilde{\omega}'^{}_p$, denominator ratio...
We report a measurement of the positive muon lifetime to precision 1.0 ppm; it is most precise particle ever measured. The experiment used time-structured, low-energy beam and segmented plastic scintillator array record more than 2×1012 decays. Two different stopping target configurations were employed in independent data-taking periods. combined results give τμ+(MuLan)=2 196 980.3(2.2) ps, 15 times as any previous experiment. gives value for Fermi constant: GF(MuLan)=1.166 378 8(7)×10−5...
We present a detailed report of the method, setup, analysis and results precision measurement positive muon lifetime. The experiment was conducted at Paul Scherrer Institute using time-structured, nearly 100%-polarized, surface beam segmented, fast-timing, plastic scintillator array. employed two target arrangements; magnetized ferromagnetic with ~4 kG internal magnetic field crystal quartz in 130 G external field. Approximately 1.6 x 10^{12} positrons were accumulated together data yield...
The rate of nuclear muon capture by the proton has been measured using a new technique based on time projection chamber operating in ultraclean, deuterium-depleted hydrogen gas, which is key to avoiding uncertainties from muonic molecule formation. hyperfine singlet ground state μp atom was obtained difference between μ− disappearance and world average for μ+ decay rate, yielding ΛS=725.0±17.4 s−1, induced pseudoscalar coupling nucleon, gP(q2=−0.88m2μ)=7.3±1.1, extracted.Received 16 April...
The MuCap experiment at the Paul Scherrer Institute has measured rate L_S of muon capture from singlet state muonic hydrogen atom to a precision 1%. A beam was stopped in time projection chamber filled with 10-bar, ultra-pure gas. Cylindrical wire chambers and segmented scintillator barrel detected electrons decay. is determined difference between mu- disappearance free decay rate. result based on analysis 1.2 10^10 decays, which we extract = (714.9 +- 5.4(stat) 5.1(syst)) s^-1 derive...
The mean life of the positive muon has been measured to a precision 11 ppm using low-energy, pulsed beam stopped in ferromagnetic target, which was surrounded by scintillator detector array. result, tau(micro)=2.197 013(24) micros, is excellent agreement with previous world average. new average 019(21) micros determines Fermi constant G(F)=1.166 371(6)x10(-5) GeV-2 (5 ppm). Additionally, measurement positive-muon lifetime needed determine nucleon pseudoscalar coupling g(P).
Part 2 of "Project X: Accelerator Reference Design, Physics Opportunities, Broader Impacts". In this Part, we outline the particle-physics program that can be achieved with Project X, a staged superconducting linac for intensity-frontier particle physics. Topics include neutrino physics, kaon muon electric dipole moments, neutron-antineutron oscillations, new light particles, hadron structure, spectroscopy, and lattice-QCD calculations. 1 is available as arXiv:1306.5022 [physics.acc-ph] 3...
Background: The rate \lambda_pp\mu\ characterizes the formation of pp\mu\ molecules in collisions muonic p\mu\ atoms with hydrogen. In measurements basic weak muon capture reaction on proton to determine pseudoscalar coupling g_P, occurs from both atomic and molecular states. Thus knowledge is required for a correct interpretation these experiments. Purpose: Recently MuCap experiment has measured \Lambda_S singlet atom, employing low density active target suppress (PRL 110, 12504 (2013))....
The anomalous magnetic moment of the muon is one most precisely measured quantities in experimental particle physics. Its latest measurement at Brookhaven National Laboratory deviates from Standard Model expectation by approximately 3.5 standard deviations. goal new experiment, E989, now under construction Fermilab, a fourfold improvement precision. Here, we discuss details future and its current status.
We propose to measure the rate \Rd\ for muon capture on deuteron better than 1.5% precision. This process is simplest weak interaction a nucleus that can both be calculated and measured high degree of The measurement will provide benchmark result, far more precise any current experimental information processes in two-nucleon system. Moreover, it impact our understanding fundamental reactions astrophysical interest, like solar pp fusion $\nu+d$ observed by Sudbury Neutrino Observatory. Recent...
Received 7 February 2011DOI:https://doi.org/10.1103/PhysRevLett.106.079901© 2011 American Physical Society
This paper presents the beam dynamics systematic corrections and their uncertainties for Run-1 data set of Fermilab Muon g-2 Experiment. Two to measured muon precession frequency $\omega_a^m$ are associated with well-known effects owing use electrostatic quadrupole (ESQ) vertical focusing in storage ring. An average vertically oriented motional magnetic field is felt by relativistic muons passing transversely through radial electric components created ESQ system. The correction depends on...