Detection of neutrinos and cosmic-ray particles
نویسندگان
چکیده
منابع مشابه
Gamma - Ray Bursts , Cosmic - Rays and Neutrinos ∗
The γ-ray burst (GRB) model for production of ultra-high-energy, > 10 eV, cosmic-rays is based on the hypothesis that GRBs arise from the dissipation of the kinetic energy of relativistic fireballs at cosmological distances. Recent observations of delayed low energy emission, “afterglow,” from GRB sources strongly support the validity of this hypothesis. Observations also provide quantitative s...
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We derive constraints on the relic abundance of a generic particle of mass ∼ 1 − 1014 TeV which decays into neutrinos at cosmological epochs, using data from the Fréjus and IMB nucleon decay detectors and the Fly’s Eye air shower array. The lifetime of such unstable particles which may constitute the dark matter today is bounded to be greater than ∼ 1014 − 1018 yr, depending on the mass. For li...
متن کاملEnergies of Cosmic-Ray Particles
Cloud chamber photographs of cosmic-ray tracks in a magnetic field up to 17,000 gauss are shown. On the assumption that the particles producing the tracks are travelling downward through the chamber rather than upward, particles of positive charge appear as well as electrons. From the specific ionization along the track it is concluded that the positives are protons, and are not nuclei of charg...
متن کاملPrimary Cosmic-ray Spectrum and the Intensity of Atmospheric Neutrinos∗
Measurements of the intensity of primary cosmic-ray protons reported in the last two years suggest a lower normalization than some earlier measurements. Here we comment on the measurements, compare them to the assumptions made in two independent calculations of atmospheric neutrinos and discuss the possible consequences for interpretation of measurements of atmospheric neutrinos. In a series of...
متن کاملCosmic Rays and High-Energy Neutrinos from Gamma-Ray Bursts
Several lines of evidence point to a relationship between gamma-ray bursts (GRBs) and the high mass stars that explode as supernovae. Arguments that GRB sources accelerate cosmic rays (CRs) are summarized. High-energy neutrino detection from individual GRBs would mean that they are hadronically dominated, that is, that the amount of energy deposited in the form of nonthermal hadrons in GRB blas...
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ژورنال
عنوان ژورنال: Journal of the Visualization Society of Japan
سال: 1999
ISSN: 1884-037X,0916-4731
DOI: 10.3154/jvs.19.supplement1_13