R. Chakraborty
A5061106384- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Particle accelerators and beam dynamics
- Muon and positron interactions and applications
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Astrophysics and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Computational Physics and Python Applications
- Scientific Research and Discoveries
- Atomic and Subatomic Physics Research
- Physics of Superconductivity and Magnetism
Paul Scherrer Institute
2023-2024
Kentucky Department of Education
2024
University of Kentucky
2021-2023
We present the first results of Fermilab Muon g-2 Experiment for positive muon magnetic anomaly $a_\mu \equiv (g_\mu-2)/2$. The is determined from precision measurements two angular frequencies. Intensity variation high-energy positrons decays directly encodes difference frequency $\omega_a$ between spin-precession and cyclotron frequencies polarized muons in a storage ring. ring field measured using nuclear resonance probes calibrated terms equivalent proton spin precession...
We present a new measurement of the positive muon magnetic anomaly, a_{μ}≡(g_{μ}-2)/2, from Fermilab Muon g-2 Experiment using data collected in 2019 and 2020. have analyzed more than 4 times number positrons decay our previous result 2018 data. The systematic error is reduced by factor 2 due to better running conditions, stable beam, improved knowledge field weighted distribution, ω[over ˜]_{p}^{'}, anomalous precession frequency corrected for beam dynamics effects, ω_{a}. From ratio...
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 present details on a new measurement of the muon magnetic anomaly, $a_\mu = (g_\mu -2)/2$. The result is based positive data taken at Fermilab's Muon Campus during 2019 and 2020 accelerator runs. uses $3.1$ GeV$/c$ polarized muons stored in $7.1$-m-radius storage ring with $1.45$ T uniform field. value $ a_{\mu}$ determined from measured difference between spin precession frequency its cyclotron frequency. This normalized to strength field, using Nuclear Magnetic Resonance (NMR). ratio...
We present a new measurement of the positive muon magnetic anomaly, $a_\mu \equiv (g_\mu - 2)/2$, from Fermilab Muon $g\!-\!2$ Experiment using data collected in 2019 and 2020. have analyzed more than 4 times number positrons decay our previous result 2018 data. The systematic error is reduced by factor 2 due to better running conditions, stable beam, improved knowledge field weighted distribution, $\tilde{\omega}'^{}_p$, anomalous precession frequency corrected for beam dynamics effects,...
The electric dipole moments~(EDM) of fundamental particles inherently violate parity~(P) and time-reversal~(T) symmetries. By virtue the CPT theorem in quantum field theory, latter also implies violation combined charge-conjugation parity~(CP) symmetry. We aim to measure EDM muon using frozen-spin technique within a compact storage trap. This method exploits high effective field, \$E \approx 165\$ MV/m, experienced rest frame with momentum about 23 MeV/c when it passes through solenoidal...
Abstract At the Paul Scherrer Institut (PSI), we are developing a high-precision apparatus with aim of searching for muon electric dipole moment (EDM) unprecedented sensitivity. The underpinning principle this experiment is frozen-spin technique, method that suppresses spin precession due to anomalous magnetic moment, thereby enhancing signal-to-noise ratio EDM signals. This increased sensitivity enables measurements would be difficult achieve conventional $$g - 2$$ <mml:math...
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...
Abstract Applying the frozen-spin technique in a compact 3 T solenoid will enable search for muon electric dipole moment (EDM) with unprecedented sensitivity, improving upon current direct limit by approximately factor of 1000. After injection selected muon, pulsed magnetic field reduce its longitudinal momentum sufficiently to be confined within static weakly-focusing and maintain closed circular orbit. A precisely tuned radial cancel spin precession induced muon's anomalous moment, = ( g -...
Abstract Despite the many successes of Standard Model particle physics, there are still several physical observations that it cannot explain, such as matter-antimatter asymmetry, non-zero neutrino masses, and microscopic nature dark matter. To address these limitations, extensions to standard model necessary, searches for electric dipole moments (EDMs) leptons valuable test. The search a muon EDM is only on bare lepton second generation, complementing an electron using polar molecules. A...
Abstract At the Paul Scherrer Institute (PSI), we are setting up an experiment to search for electric dipole moment (EDM) of muon using frozen-spin technique. The discovery a EDM would indicate violation charge conjugation parity symmetry (CP-violation) and lepton flavor universality, beyond Standard Model. aims achieve sensitivity σ ( d μ ) ≤ 6 × 10 -23 e · cm. This study is taking place during first phase it focuses on off-axis injection muons into 3 T storage solenoid. Muons need be...
Electric dipole moments (EDM) of non-degenerate systems with angular momentum violate parity and time symmetry, by the virtue CPT-theorem also combined symmetry charge (CP). Although CP violation (CPV) is an established ingredient weak sector standard model particle physics (SM), its contribution to EDM a fundamental too small be measured any soon. Therefore, discovery would genuine signal yet unobserved physics. As muon only accessible probe second generation fermions fermion which can on...