215 citations · 2.2k across the 37 of their papers we have counts for
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Superluminal problem in diffusion of relativistic particles and its phenomenological solution
R. Aloisio, V. Berezinsky, A. Gazizov
We discuss the superluminal problem in the diffusion of ultra high energy protons with energy losses taken into account. The phenomenological solution of this problem is found with…
Secondary protons from ultra high energy cosmic ray nuclei: is the Greisen-Zatsepin-Kuzmin cutoff unavoidable?
R. Aloisio, V. Berezinsky, A. Gazizov
We discuss the production of ultra high energy secondary protons by cosmic ray primary nuclei propagating in the intergalactic space through Cosmic Microwave Background (CMB) and I…
Analytic calculations of the spectra of ultra-high energy cosmic ray nuclei. I. The case of CMB radiation
R. Aloisio, V. Berezinsky, S. Grigorieva
We present a systematic study of different methods for the analytic calculation of ultra-high energy nuclei diffuse spectra. Nuclei propagating in the intergalactic space are photo…
Transition from galactic to extragalactic cosmic rays
V. Berezinsky
The transition from galactic to extragalactic cosmic rays is discussed. One of critical indications for transition is given by the Standard Model of Galactic cosmic rays, according…
Ultra High Energy Cosmic Rays Diffusion in an Expanding Universe
R. Aloisio, V. Berezinsky, A. Gazizov
We study the solution of the diffusion equation for Ultra-High Energy Cosmic Rays in the general case of an expanding universe, comparing it with the well known Syrovatsky solution…
Super Heavy Dark Matter and UHECR Anisotropy at Low Energy
R. Aloisio, F. Tortorici
Super Heavy quasi-stable particles are naturally produced in the early universe and could represent a substantial fraction of the Dark Matter: the so-called Super Heavy Dark Matter…
Signatures of the transition from galactic to extragalactic cosmic rays
R. Aloisio, V. Berezinsky, P. Blasi +1
We discuss the signatures of the transition from galactic to extragalactic cosmic rays in different scenarios, giving most attention to the dip scenario. The dip is a feature in th…
Propagation and Chemical Composition of Ultra High Energy Cosmic Rays
Roberto Aloisio
Extragalactic cosmic ray protons with an injection spectrum of the type show a spectrum on earth with a dip due to the Bethe-Heitler pair production against the photons…
A dip in the UHECR spectrum and the transition from galactic to extragalactic cosmic rays
R. Aloisio, V. Berezinsky, P. Blasi +3
The dip is a feature in the diffuse spectrum of ultra-high energy (UHE) protons caused by electron-positron pair production on the cosmic microwave background (CMB) radiation. For…
On the status of superheavy dark matter
R. Aloisio, V. Berezinsky, M. Kachelriess
Superheavy particles are a natural candidate for the dark matter in the universe and our galaxy, because they are produced generically during inflation in cosmologically interestin…
Anti-GZK effect in UHECR spectrum
R. Aloisio, V. S. Berezinsky
In this paper we discuss the anti-GZK effect that arises in the framework of the diffusive propagation of Ultra High Energy (UHE) protons. This effect consists in a jump-like incre…
Anti-GZK effect in Ultra High Energy Cosmic Rays diffusive propagation
R. Aloisio, V. S. Berezinsky
We discuss the antiGZK effect in the diffusive propagation of ultra high energy protons in intergalactic magnetic fields, which consists in a jump-like increase of the maximum dist…
Ultra High Energy Cosmic Rays Spectra in Top-Down models
R. Aloisio, V. Berezinsky, M. Kachelriess
In this work we present a detailed computation of the spectra of UHECR in the top-down scenario. We compare the spectra of hadrons obtained by two different methods in QCD and supe…
Multiwavelength Observation of WIMP Annihilation
Roberto Aloisio
The annihilation of neutralino dark matter may result in observable signals in different wavelength. In the present paper we will discuss the effect of neutralino annihilation in t…
Diffusive propagation of UHECR and the propagation theorem
R. Aloisio, V. Berezinsky
We present a detailed analytical study of the propagation of ultra high energy (UHE) particles in extragalactic magnetic fields. The crucial parameter which affects the diffuse spe…
Neutralino Annihilation at the Galactic Center Revisited
Roberto Aloisio, Pasquale Blasi, Angela V. Olinto
The annihilation of neutralino dark matter in the Galactic Center (GC) may result in radio signals that can be used to detect or constrain the dark matter halo density profile or d…
Gamma-Ray Constraints on Neutralino Dark Matter Clumps in the Galactic Halo
R. Aloisio, P. Blasi, A. V. Olinto
According to high resolution cold dark matter (CDM) simulations, large virialized halos are formed through the constant merging of smaller halos formed at earlier times. In particu…
Theory of synchrotron radiation: II. Backreaction in ensembles of particles
Roberto Aloisio, Pasquale Blasi
The standard calculations of the synchrotron emission from charged particles in magnetic fields does not apply when the energy losses of the particles are so severe that their ener…
Theory of synchrotron radiation: I. Coherent emission from ensembles of particles
Roberto Aloisio, Pasquale Blasi
Synchrotron emission of relativistic particles in magnetic fields is a process of paramount importance in astrophysics. Although known for over thirty years, there are still aspect…
Probing The Structure of Space-Time with Cosmic Rays
R. Aloisio, P. Blasi, P. L. Ghia +1
The study of the interactions of Cosmic Rays (CR's) with universal diffuse background radiation can provide very stringent tests of the validity of Special Relativity. The interact…