M. Iacovacci
A5044772691- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Neutrino Physics Research
- Radiation Detection and Scintillator Technologies
- Gamma-ray bursts and supernovae
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Atomic and Subatomic Physics Research
- Radio Astronomy Observations and Technology
- Particle Accelerators and Free-Electron Lasers
- Cosmology and Gravitation Theories
- Pulsars and Gravitational Waves Research
- Muon and positron interactions and applications
- Radiation Therapy and Dosimetry
- Solar and Space Plasma Dynamics
- Superconducting Materials and Applications
- Medical Imaging Techniques and Applications
- Precipitation Measurement and Analysis
- Scientific Research and Discoveries
- Radioactivity and Radon Measurements
- Particle accelerators and beam dynamics
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2015-2024
University of California, San Diego
2024
Naples Anesthesia & Physician Associates
2024
University of Zurich
2023
Xenon Pharmaceuticals (Canada)
2023
University of Naples Federico II
1992-2022
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2017
Istituto Nazionale di Fisica Nucleare
1991-2015
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2015
Authorised Association Consortium
2015
We report results from searches for new physics with low-energy electronic recoil data recorded the XENON1T detector. With an exposure of 0.65 tonne-years and unprecedentedly low background rate 76±2stat events/(tonne×year×keV) between 1 30 keV, enable one most sensitive solar axions, enhanced neutrino magnetic moment using neutrinos, bosonic dark matter. An excess over known backgrounds is observed at energies prominent 2 3 keV. The axion model has a 3.4σ significance, three-dimensional 90%...
We report constraints on light dark matter (DM) models using ionization signals in the XENON1T experiment. mitigate backgrounds with strong event selections, rather than requiring a scintillation signal, leaving an effective exposure of (22±3) tonne day. Above ∼0.4 keV_{ee}, we observe <1 event/(tonne day keV_{ee}), which is more 1000 times lower similar searches other detectors. Despite observing higher rate at energies, no DM or CEvNS detection may be claimed because cannot model all our...
XENONnT is a dark matter direct detection experiment, utilizing 5.9 t of instrumented liquid xenon, located at the INFN Laboratori Nazionali del Gran Sasso. In this work, we predict experimental background and project sensitivity to weakly interacting massive particles (WIMPs). The expected average differential rate in energy region interest, corresponding (1, 13) keV (4, 50) for electronic nuclear recoils, amounts $12.3 \pm 0.6$ (keV y)$^{-1}$ $(2.2\pm 0.5)\times 10^{-3}$ y)$^{-1}$,...
We report the first experimental results on spin-dependent elastic weakly interacting massive particle (WIMP) nucleon scattering from XENON1T dark matter search experiment. The analysis uses full ton year exposure of to constrain proton-only and neutron-only cases. No significant signal excess is observed, a profile likelihood ratio used set exclusion limits WIMP-nucleon interactions. This includes most stringent constraint date WIMP-neutron cross section, with minimum 6.3×10^{-42} cm^{2} at...
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...
Direct dark matter detection experiments based on a liquid xenon target are leading the search for particles with masses above $\sim$ 5 GeV/c$^2$, but have limited sensitivity to lighter because of small momentum transfer in matter-nucleus elastic scattering. However, there is an irreducible contribution from inelastic processes accompanying scattering, which leads excitation and ionization recoiling atom (the Migdal effect) or emission Bremsstrahlung photon. In this letter, we report probe...
We report on a blinded analysis of low-energy electronic-recoil data from the first science run XENONnT dark matter experiment. Novel subsystems and increased 5.9 tonne liquid xenon target reduced background in (1, 30) keV search region to $(15.8 \pm 1.3)$ events/(tonne$\times$year$\times$keV), lowest ever achieved detector $\sim$5 times lower than XENON1T. With an exposure 1.16 tonne-years, we observe no excess above set stringent new limits solar axions, enhanced neutrino magnetic moment,...
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...
Delayed single- and few-electron emissions plague dual-phase time projection chambers, limiting their potential to search for light-mass dark matter. This paper examines the origins of these events in XENON1T experiment. Characterization intensity delayed electron backgrounds shows that resulting are correlated, position, with high-energy can effectively be vetoed. In this work we extend previous S2-only analyses down a single electron. From analysis, after removing correlated backgrounds,...
We present the first measurement of nuclear recoils from solar <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mmultiscripts><a:mrow><a:mi mathvariant="normal">B</a:mi></a:mrow><a:mprescripts/><a:none/><a:mrow><a:mn>8</a:mn></a:mrow></a:mmultiscripts></a:mrow></a:math> neutrinos via coherent elastic neutrino-nucleus scattering with XENONnT dark matter experiment. The central detector is a low-background, two-phase time projection chamber 5.9 t sensitive...
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...
We report on a search for nuclear recoil signals from solar $^8$B neutrinos elastically scattering off xenon nuclei in XENON1T data, lowering the energy threshold 2.6 keV to 1.6 keV. develop variety of novel techniques limit resulting increase backgrounds near threshold. No significant neutrino-like excess is found an exposure 0.6 t $\times$ y. For first time, we use non-detection constrain light yield 1-2 recoils liquid xenon, as well non-standard neutrino-quark interactions. Finally,...
The XENON1T experiment searches for dark matter particles through their scattering off xenon atoms in a 2 tonne liquid target. detector is dual-phase time projection chamber, which measures simultaneously the scintillation and ionization signals produced by interactions target volume, to reconstruct energy position, as well type of interaction. background rate central volume lowest achieved so far with xenon-based direct detection experiment. In this work we describe response model detector,...
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 multi-staged XENON program at INFN Laboratori Nazionali del Gran Sasso aims to detect dark matter with two-phase liquid xenon time projection chambers of increasing size and sensitivity. XENONnT experiment is the latest detector in program, planned be an upgrade its predecessor XENON1T. It features active target 5.9 tonnes cryogenic (8.5 total mass cryostat). expected extend sensitivity WIMP by more than order magnitude compared XENON1T, thanks larger significantly reduced background,...
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,...