P. Girotti
A5058973324- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- High-Energy Particle Collisions Research
- Superconducting Materials and Applications
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Dark Matter and Cosmic Phenomena
- Particle accelerators and beam dynamics
- Neutrino Physics Research
- Quantum Chromodynamics and Particle Interactions
- Muon and positron interactions and applications
- Advanced Data Storage Technologies
- Scientific Research and Discoveries
- Radiation Detection and Scintillator Technologies
- Astrophysics and Cosmic Phenomena
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2019-2024
University of Pisa
2019-2023
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,...
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...
The Muon $g-2$ experiment, E989, is currently taking data at Fermilab with the aim of reducing experimental error on muon anomaly by a factor four and possibly clarifying current discrepancy theoretical prediction. A central component this four-fold improvement in precision laser calibration system calorimeters, which has to monitor gain variations photo-sensors 0.04\% short-term ($\sim 1\,$ms). This about one order magnitude better than what ever been achieved for particle physics...
The muon anomalous magnetic moment, a μ = ( g – 2)/2, is low-energy observable which can be both measured and computed with very high precision, making it an excellent test of the Standard Model (SM) sensitive probe new physics. Recent efforts improved precision theoretical prediction experimental measurement. On theory side, Muon 2 Theory Initiative, international team more than 130 physicists, reached in 2020 consensus on SM for . E989 Collaboration at Fermilab (FNAL) published April 2021...
of particle beam physics with a high energy experiment. Here the dynamics issues and analysis techniques essential to g-2 experiment are presented discussed.
In high energy physics experiments, calorimeters are calibrated to produce precise and accurate results. Laser light can be used for calibration when the detectors sensitive photons in that particular range, which is often case. Moreover, it not unusual detection systems consist of hundreds channels have independently, stringent requirements on distribution system terms temporal spatial stability, timing. Furthermore, economic factor ease production taken into account. We present a prototype...
The Muon $g-2$ Experiment at Fermilab aims to measure the muon anomalous magnetic moment with unprecedented precision of 140 parts per billion (ppb). In April 2021 collaboration published first measurement, based on year data taking. result confirmed previous experiment Brookhaven National Laboratory (BNL), and increased long-standing tension Standard Model prediction 4.2 $\sigma$. is now running sixth acquisition positive data, having accumulated a total $\sim$19 times statistics BNL...