Roberto Aloisio
A5054549840- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- Particle Detector Development and Performance
- Noncommutative and Quantum Gravity Theories
- High-Energy Particle Collisions Research
- Radio Astronomy Observations and Technology
- Quantum Chromodynamics and Particle Interactions
- Particle Accelerators and Free-Electron Lasers
- Solar and Space Plasma Dynamics
- Black Holes and Theoretical Physics
- Atmospheric Ozone and Climate
- Radiation Therapy and Dosimetry
- Theoretical and Computational Physics
- Ionosphere and magnetosphere dynamics
- Quantum Mechanics and Applications
- Atomic and Subatomic Physics Research
- Relativity and Gravitational Theory
- Seismology and Earthquake Studies
- Seismic Waves and Analysis
- Earthquake Detection and Analysis
- Radiation Detection and Scintillator Technologies
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2015-2025
Gran Sasso Science Institute
2016-2025
University of L'Aquila
1998-2024
Istituto Nazionale di Fisica Nucleare
1998-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Lecce
2023
Consejo Nacional de Investigaciones Científicas y Técnicas
2023
University of Buenos Aires
2023
Instituto de Tecnologías en Detección y Astropartículas
2023
National Technological University
2023
Pierre Auger Observatory
2023
XIPE, the X-ray Imaging Polarimetry Explorer, is a mission dedicated to Astronomy. At time of writing XIPE in competitive phase A as fourth medium size ESA (M4). It promises reopen polarimetry window high energy Astrophysics after more than 4 decades thanks detector that efficiently exploits photoelectric effect and optics with large effective area. uniqueness time-spectrally-spatially- resolved breakthrough astrophysics fundamental physics. Indeed payload consists three Gas Pixel Detectors...
Abstract The Probe Of Extreme Multi-Messenger Astrophysics (POEMMA) is designed to accurately observe ultra-high-energy cosmic rays (UHECRs) and neutrinos from space with sensitivity over the full celestial sky. POEMMA will air fluorescence produced by extensive showers (EASs) UHECRs potentially UHE above 20 EeV. Additionally, has ability Cherenkov signal upward-moving EASs induced Earth-interacting tau PeV. spacecraft are quickly re-orientate follow up transient neutrino sources obtain...
We provide an updated assessment of the power Cherenkov Telescope Array (CTA) to search for thermally produced dark matter at TeV scale, via associated gamma-ray signal from pair-annihilating particles in region around Galactic centre. find that CTA will open a new window discovery potential, significantly extending range robustly testable models given standard cuspy profile density distribution. Importantly, even cored profile, projected sensitivity be sufficient probe various...
Abstract The combined fit of the measured energy spectrum and shower maximum depth distributions ultra-high-energy cosmic rays is known to constrain parameters astrophysical models with homogeneous source distributions. Studies distribution cosmic-ray arrival directions show a better agreement in which fraction flux non-isotropic associated nearby radio galaxy Centaurus A or catalogs such as that starburst galaxies. Here, we present novel combination both analyses by simultaneous directions,...
We present measurements of the atmospheric depth shower maximum <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>X</a:mi><a:mi>max</a:mi></a:msub></a:math>, inferred for first time on an event-by-event level using surface detector Pierre Auger Observatory. Using deep learning, we were able to extend <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msub><c:mi>X</c:mi><c:mi>max</c:mi></c:msub></c:math> distributions up energies 100 EeV...
We report an investigation of the mass composition cosmic rays with energies from 3 to 100 EeV (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>1</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi>EeV</a:mi><a:mo>=</a:mo><a:msup><a:mrow><a:mn>10</a:mn></a:mrow><a:mrow><a:mn>18</a:mn></a:mrow></a:msup><a:mtext> </a:mtext><a:mi>eV</a:mi></a:mrow></a:math>) using distributions depth shower maximum <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"...
We use a kinetic-equation approach to describe the propagation of ultra high energy cosmic ray protons and nuclei calculate expected spectra mass composition at Earth for different assumptions on source injection chemical abundances. When compared with spectrum, elongation rate $X_{max}(E)$ dispersion $\sigma(X_{max})$ as observed Pierre Auger Observatory, several important consequences can be drawn: a) must very hard, $\sim E^{-\gamma}$ $\gamma\sim 1-1.6$; b) maximum charge $Z$ in sources...
The unprecedented quality of the data collected by AMS-02 experiment onboard International Space Station allowed us to address subtle questions concerning origin and propagation cosmic rays. Here we discuss implications these for injection spectrum elements with different masses diffusion coefficient probed rays through their journey from sources Earth. We find that best fit spectra primary secondary nuclei requires (1) a break in energy dependence at energies $\sim 300$ GV; (2) an is same...
The flux of unstable secondary cosmic ray nuclei, produced by spallation processes in the interstellar medium, can be used to constrain residence time rays inside Galaxy. Among them, $^{10}$Be is especially useful because its relatively long half-life 1.39 Myr. In framework diffusive halo model we describe transport taking into account all relevant interaction channels and accounting for decay nuclei. We then compare our results with data collected Alpha Magnetic Spectrometer (AMS-02) on...
The diffusive paradigm for the transport of Galactic cosmic rays is central to our understanding origin these high energy particles. However, it worth recalling that normalization, dependence, and spatial extent diffusion coefficient in interstellar medium are fitted data typically not derived from more basic principles. Here, we discuss a scenario which properties combination wave self-generation advection disc, where sources assumed be located. We show first time halo naturally arises...
We present a novel calculation of the spectrum electrons and positrons from random sources, supernova remnants pulsars, distributed within spiral arms Galaxy. The pulsar emissivity in terms electron-positron pairs is considered as time dependent, following magnetic dipole spin-down luminosity, temporal evolution potential drop accounted for. Moreover each pulsar, with field initial spin period selected at observed distribution, source only after it leaves parent due to its birth kick...
We test the predictions of hadronic interaction models regarding depth maximum air-shower profiles, <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>X</a:mi><a:mi>max</a:mi></a:msub></a:math>, and ground-particle signals in water-Cherenkov detectors at 1000 m from shower core, <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>S</c:mi><c:mo stretchy="false">(</c:mo><c:mn>1000</c:mn><c:mo stretchy="false">)</c:mo></c:math>, using...
The study of the interactions cosmic rays (CR's) with universal diffuse background radiation can provide very stringent tests validity special relativity. we consider are ones characterized by well defined energy thresholds whose position be predicted on basis We argue that experimental confirmation existence these in principle put limits scale where relativity and/or continuity space-time may possibly break down.
We use an updated version of SimProp, a Monte Carlo simulation scheme for the propagation ultra-high energy cosmic rays, to compute cosmogenic neutrino fluxes expected on Earth in various scenarios. These are compared with newly detected IceCube events at PeV energies and recent experimental limits EeV Pierre Auger Observatory. This comparison allows us draw some interesting conclusions about source models rays. will show how available observations almost level constraining such models,...
The Probe Of Extreme Multi-Messenger Astrophysics (POEMMA) mission is being designed to establish charged particle astronomy with ultra-high energy cosmic rays (UHECRs) and observe cosmogenic tau neutrinos (CTNs). study of UHECRs CTNs from space will yield orders-of-magnitude increase in statistics observed at the highest energies observation flux for a range UHECR models. These observations should solve long-standing puzzle origin particles ever observed, providing new window onto most...
We introduce the new version of SimProp, a Monte Carlo code for simulating propagation ultra-high energy cosmic rays in intergalactic space. This version, SimProp v2r4, together with an overall improvement capabilities substantial reduction computation time, also computes secondary cosmogenic particles such as electron-positron pairs and gamma produced during rays. As recently pointed out by several authors, flux this radiation its products, within reach current observatories, provides...
The (AERA), part of the Pierre Auger Observatory, is currently largest array radio antenna stations deployed for detection cosmic rays, spanning an area <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mn>17</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:msup><a:mrow><a:mi>km</a:mi></a:mrow><a:mn>2</a:mn></a:msup></a:math> with 153 stations. It detects emission extensive air showers produced by rays in 30–80 MHz band. Here, we report AERA measurements (<c:math...
We present a detailed analytical study of the propagation ultra high energy (UHE) particles in extragalactic magnetic fields. The crucial parameter which affects diffuse spectrum is separation between sources. In case uniform distribution sources with them much smaller than all characteristic lengths, UHE has {\em universal} form, independent mode propagation. This statement status theorem. proof obtained using particle number conservation during propagation, and also kinetic equation for...
Context: Features in the spectra of primary cosmic rays (CRs) provide invaluable information on propagation these particles Galaxy. In rigidity region around a few hundred GV, such features have been measured proton and helium by PAMELA experiment later confirmed with higher significance AMS-02. We investigate implications datasets for scenario which CRs propagate under action self-generated waves. Aims: show that recent data spectrum protons nuclei as collected AMS-02 Voyager are very good...