G. Di Sciascio
A5059716819- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Gamma-ray bursts and supernovae
- Radiation Detection and Scintillator Technologies
- Radiation Therapy and Dosimetry
- Radio Astronomy Observations and Technology
- High-Energy Particle Collisions Research
- Particle Accelerators and Free-Electron Lasers
- Pulsars and Gravitational Waves Research
- Solar and Space Plasma Dynamics
- Atomic and Subatomic Physics Research
- Precipitation Measurement and Analysis
- Muon and positron interactions and applications
- Superconducting Materials and Applications
- Geophysics and Gravity Measurements
- Astronomy and Astrophysical Research
- Computational Physics and Python Applications
- Scientific Research and Discoveries
- Radioactivity and Radon Measurements
- Particle accelerators and beam dynamics
- Cosmology and Gravitation Theories
- Ionosphere and magnetosphere dynamics
Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata
2014-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2012-2024
University of Rome Tor Vergata
2008-2024
Institute of High Energy Physics
2023
Chinese Academy of Sciences
2023
Peking University
2023
Kavli Institute for Theoretical Sciences
2023
Istituto Nazionale di Fisica Nucleare
2006-2022
National Institute for Astrophysics
2021
Campbell Collaboration
2007-2021
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 measurement of cosmic ray energy spectra, in particular for individual species, is an essential approach finding their origin. Locating the "knees" spectra important part and has yet to be achieved. Here we report a mixed Hydrogen Helium spectrum using combination ARGO-YBJ experiment prototype Cherenkov telescope LHAASO experiment. A knee feature at 640+/-87 TeV, with clear steepening spectrum, observed. This gives fundamental inputs galactic acceleration models.
The events recorded by ARGO-YBJ in more than five years of data collection have been analyzed to determine the diffuse gamma-ray emission Galactic plane at longitudes 25° < l 100° and latitudes . energy range covered this analysis, from ∼350 GeV ∼2 TeV, allows connection region explored Fermi with multi-TeV measurements carried out Milagro. Our analysis has focused on two selected regions plane, i.e., 40° 65° 85° (the Cygnus region), where Milagro observed an excess respect predictions...
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...
Since the science white paper of Large High Altitude Air Shower Observatory (LHAASO) published on arXiv in 2019 [e-Print: 1905.02773 (astro-ph.HE)], LHAASO has completed transition from a project to an operational gamma-ray astronomical observatory is new generation multi-component facility located Daocheng, Sichuan province China, at altitude 4410 meters. It aims measuring with unprecedented sensitivity spectrum, composition, and anisotropy cosmic rays energy range between 10$^{12}$...
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...
The amplitude and phase of the cosmic-ray anisotropy are well established experimentally between 1011 eV 1014 eV. study their evolution in energy region 1014–1016 can provide a significant tool for understanding steepening ("knee") primary spectrum. In this Letter, we extend EAS-TOP measurement performed at E0 ≈ to higher energies by using full data set (eight years taking). Results derived about 4 × compared discussed. Hints increasing change above reported. significance observation propagation is
The ARGO-YBJ detector is an extensive air shower array that has been used to monitor the northern $\gamma$-ray sky at energies above 0.3 TeV from 2007 November 2013 January. In this paper, we present results of a survey in declination band $-10^{\circ}$ $70^{\circ}$, using data recorded over past five years. With integrated sensitivity ranging 0.24 $\sim$1 Crab units depending on declination, six sources have detected with statistical significance greater than 5 standard deviations. Several...
Measuring the anisotropy of arrival direction distribution cosmic rays provides important information on propagation mechanisms and identification their sources. In fact, flux is thought to be dependent only due presence nearby ray sources or particular magnetic-field structures. Recently, observation unexpected excesses at TeV energy down an angular scale as narrow $\ensuremath{\sim}10\ifmmode^\circ\else\textdegree\fi{}$ raised possibility that problem origin Galactic may addressed by...
This paper reports on the measurement of large-scale anisotropy in distribution cosmic-ray arrival directions using data collected by air shower detector ARGO-YBJ from 2008 January to 2009 December, during minimum solar activity between cycles 23 and 24. In this period, more than 2 × 1011 showers were recorded with energies ∼1 30 TeV. The observed two-dimensional cosmic rays is characterized two wide regions excess deficit, respectively, both relative intensity ∼10−3 respect a uniform flux,...
Cosmic rays are hampered by the Moon and a deficit in its direction is expected (the so-called shadow). The shadow an important tool to determine performance of air shower array. Indeed, westward displacement center, due bending effect geomagnetic field on propagation cosmic rays, allows setting absolute rigidity scale primary particles inducing showers recorded detector. In addition, shape permits detector point spread function, while position at high energies evaluation pointing accuracy....
ARGO-YBJ is an air shower detector array with a fully covered layer of resistive plate chambers. It operated high duty cycle and large field view. continuously monitors the northern sky at energies above 0.3 TeV. In this paper, we report long-term monitoring Mrk 421 over period from 2007 November to 2010 February. This source was observed by satellite-borne experiments Rossi X-ray Timing Explorer Swift in band. especially active first half 2008. Many flares are both γ-ray bands...
As one of the brightest active blazars in both X-ray and very high energy $\gamma$-ray bands, Mrk 501 is useful for physics associated with jets from AGNs. The ARGO-YBJ experiment monitoring it $\gamma$-rays above 0.3 TeV since November 2007. Starting October 2011 largest flare 2005 observed, which lasts to about April 2012. In this paper, a detailed analysis reported. During flaring episodes 17 22, 2011, an excess event rate over 6 $\sigma$ detected by direction 501, corresponding increase...
The extended TeV gamma-ray source ARGO J2031+4157 (or MGRO J2031+41) is positionally consistent with the Cygnus Cocoon discovered by Fermi-LAT at GeV energies in superbubble. Reanalyzing ARGO-YBJ data collected from 2007 November to 2013 January, angular extension and energy spectrum of are evaluated. After subtracting contribution overlapping sources, excess map fitted a two-dimensional Gaussian function square region 10° × 10°, finding σext= 18 ± 05. observed differential dN/dE = (2.5 0.4)...
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 proton-air cross section in the energy range 1--100 TeV has been measured by ARGO-YBJ cosmic ray experiment. analysis is based on primary flux attenuation for different atmospheric depths (i.e. zenith angles) and exploits detector capabilities of selecting shower development stage means hit multiplicity, density lateral profile measurements at ground. effects fluctuations, contribution heavier primaries uncertainties hadronic interaction models, have taken into account. results used to...
We report the observation of TeV gamma-rays from Cygnus region using ARGO-YBJ data collected 2007 November to 2011 August. Several sources are located in this including two bright extended MGRO J2019+37 and J2031+41. According Milagro set, at 20 is most significant source apart Crab Nebula. No signal detected by experiment, derived flux upper limits 90% confidence level for all events above 600 GeV with medium energy 3 lower than flux, implying that might be variable hard identified as a...