Showing papers in "Astroparticle Physics in 2004"
University of Mainz1, University of Delaware2, University of California, Berkeley3, University of Wuppertal4, University of Maryland, College Park5, Université libre de Bruxelles6, University of Kansas7, Stockholm University8, Uppsala University9, Lawrence Berkeley National Laboratory10, University of Mons11, University of Wisconsin-Madison12, Pennsylvania State University13, Vrije Universiteit Brussel14, George Mason University15, Southern University and A&M College16, Clark Atlanta University17, Chiba University18, Imperial College London19, University of Wisconsin–River Falls20, Simón Bolívar University21, Utrecht University22
TL;DR: In this paper, a Monte Carlo study of the sensitivity of the planned IceCube detector to predicted fluxes of muon neutrinos at TeV to PeV energies is presented.
354 citations
TL;DR: In this paper, the neutrino emission from individual γ-ray bursts observed by the BATSE detector on the Compton Gamma-Ray Observatory was estimated based on the assumption that equal kinetic energy is dissipated into electrons and protons.
260 citations
TL;DR: The origin of the knee in the energy spectrum of cosmic rays is an outstanding problem in astroparticle physics and various mechanisms have been proposed to explain the structure in the all-particle spectrum as discussed by the authors.
181 citations
TL;DR: In this article, the effects of baryonic cooling on dark matter halo profiles can alter the dark matter power spectrum at k ∼10 h Mpc −1 and lead to percent level changes in the convergence angular power spectrum.
159 citations
TL;DR: In this article, the spectral features of a gamma-ray source were shown to be compatible with pair annihilations of WIMPs induced by weakly interacting massive particles (WIMPs).
139 citations
TL;DR: In this article, the photon yields in 15 wave bands between 300nm and 430nm have been determined, and the total photon yield in air excited by a 0.85-MeV electron is 3.81−±−0.13 (±13% systematics) photons per meter at 1013hPa and 20°C.
134 citations
TL;DR: The High Energy Stereoscopic System (H.E.S) as mentioned in this paper is a new system of large atmospheric Cherenkov telescopes for GeV/TeV γ-ray astronomy.
118 citations
TL;DR: In this paper, the authors revisited the neutron flux induced by radioactivity at the Gran Sasso underground laboratory and performed calculations and Monte Carlo simulations; the results offer an independent check to the available experimental data reported by different authors, which vary rather widely.
117 citations
TL;DR: In this article, the spectrum of synchrotron radiation from the coupling of an electrically charged particle to an external magnetic field in the presence of quantum-gravity effects of the general form (E/MQG)α was derived.
115 citations
TL;DR: In this paper, a model for the origin of cosmic rays (CRs) from ∼10 14 eV/nucleon to the highest energies (≳10 20 eV) was proposed.
110 citations
INAF1
TL;DR: In this article, the authors present the first description of the nonlinear regime of shock acceleration when the supernova wave propagates in a medium where seed particles are already present, where cosmic rays are in equipartition with the gas pressure.
TL;DR: This test finds that the AGASA data is consistent at the 8% level with the null hypothesis of isotropically distributed arrival directions, and offers an unbiased test of the clustering hypothesis.
TL;DR: In this paper, the authors present results from a fully relativistic Monte Carlo simulation of diffusive shock acceleration (DSA) in unmodified shocks, which uses a single algorithmic sequence to smoothly span the range from non-relativistic speeds to full relativist shocks of arbitrary obliquity.
TL;DR: In this paper, simulations of the neutron background for future large-scale particle dark matter detectors are presented, where neutrons were generated in rock and detector elements via spontaneous fission and (α,n) reactions, and by cosmic-ray muons.
TL;DR: In this paper, the decoupling of a cold relic during a decaying-particle-dominated cosmological evolution is analyzed, the relic density is calculated both numerically and semi-analytically and the results are compared with each other.
TL;DR: In this article, the evolution of the cosmic ray primary composition in the energy range 10 6 −10 7 GeV (i.e. the "knee" region) is studied by means of the e.m. and muon data of the Extensive Air Shower EAS-TOP array (Campo Imperatore, National Gran Sasso Laboratories).
TL;DR: In this article, Monte Carlo simulations of τ-neutrino propagation through the Earth accounting for neutrino interactions, τ energy losses and τ decays are presented, and a calculation of ντ double bang event rates in km3 scale detectors are presented.
TL;DR: In this paper, the spectrum of neutrinos with an average energy ∼2 MeV was calculated with the use of the Monte Carlo method and the most promising results are from ν e + p → n + e + reaction.
TL;DR: In this article, the best-fit values of neutrino parameters are Δm2=7.1×10−5 eV2, tan2θ=0.40 with the boron flux fB=1.04.
University of Bologna1, University of Naples Federico II2, University of Pisa3, California Institute of Technology4, University of Bari5, University of Salento6, Indiana University7, Roma Tre University8, University of L'Aquila9, National Research Council10, Pennsylvania State University11, University of Michigan12, University of Trieste13, University of Minnesota14, Boston University15, Sapienza University of Rome16, Massachusetts Institute of Technology17, University of Calabria18, Drexel University19, Macalester College20, University of Turin21, University of Basilicata22, University of Eastern Piedmont23, Texas A&M University24
TL;DR: In this paper, the cosmic ray primary composition in the energy range between 10 15 and 10 16 eV, i.e., around the knee of the primary spectrum, has been studied through the combined measurements of the EAS-TOP air shower array and the MACRO underground detector.
TL;DR: In this article, the number of doublets and triplets observed by AGASA can be best reproduced for a source density of ∼10 −5 Mpc −3, with large uncertainties.
TL;DR: The contribution of different components of an air shower to the total energy deposit in the atmosphere, for different angles and primary particles, was studied using the CORSIKA air shower simulation code.
University of Mainz1, University of Delaware2, University of California, Berkeley3, University of Wuppertal4, University of California, Irvine5, Université libre de Bruxelles6, Uppsala University7, University of Wisconsin-Madison8, Stockholm University9, University of Mons-Hainaut10, Pennsylvania State University11, Vrije Universiteit Brussel12, University of Maryland, College Park13, Lawrence Berkeley National Laboratory14, Imperial College London15, University of Wisconsin–River Falls16, Simón Bolívar University17
TL;DR: In this article, a search for electro-magnetic and/or hadronic showers (cascades) induced by high-energy neutrinos in the data collected with the AMANDA II detector during the year 2000 is reported.
TL;DR: In this article, the transition from galactic to extragalactic cosmic rays is distinctly seen in spectra of protons and iron nuclei, when they are measured separately, and the shape of the predicted iron spectrum agrees with the Hall diffusion.
TL;DR: In this paper, it is argued that large scale cosmic magnetic field could be generated in the primeval plasma slightly before hydrogen recombination, and that nonzero vorticity, necessary for that, might be created by the photon diffusion in the second order in the temperature fluctuations.
TL;DR: In this paper, a starquake mechanism for pulsar glitches is developed in the solid quark star model and the general glitch natures (i.e., the glitch amplitudes and the time intervals) can be reproduced in the star model with high baryon density but low temperature.
TL;DR: In this paper, the modifications induced in the standard weak-lensing formula if Newtonian gravity differs from inverse square law at large distances are studied and the possibility of putting bounds on the mass of gravitons from lensing data is explored.
TL;DR: In this paper, the impact of the atmospheric density profile on the reconstruction of the depth of maximum, as observed in fluorescence light measurements, is investigated in detail at the site of the southern Pierre Auger Observatory, using data obtained from meteorological radio soundings.
TL;DR: An analytical description of the time structure of the pulses induced by muons in air showers at ground level is deduced assuming the production distance distribution for the muons can be obtained elsewhere.
TL;DR: In this article, the authors describe the simulation data produced by a pilot program to compute mock weak gravitational lensing maps for a range of currently popular cosmological models by ray tracing through high-resolution N -body simulations.