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Title: Muon acceleration in cosmic-ray sources

Many models of ultra-high energy cosmic-ray production involve acceleration in linear accelerators located in gamma-ray bursts, magnetars, or other sources. These transient sources have short lifetimes, which necessitate very high accelerating gradients, up to 10{sup 13} keV cm{sup –1}. At gradients above 1.6 keV cm{sup –1}, muons produced by hadronic interactions undergo significant acceleration before they decay. This muon acceleration hardens the neutrino energy spectrum and greatly increases the high-energy neutrino flux. Using the IceCube high-energy diffuse neutrino flux limits, we set two-dimensional limits on the source opacity and matter density, as a function of accelerating gradient. These limits put strong constraints on different models of particle acceleration, particularly those based on plasma wake-field acceleration, and limit models for sources like gamma-ray bursts and magnetars.
Authors:
;  [1] ;  [2]
  1. Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States)
  2. Fakultät für Physik and Astronomie, Theoretische Physik I, Ruhr-Universität Bochum, D-44780 Bochum (Germany)
Publication Date:
OSTI Identifier:
22348468
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 779; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCELERATION; COSMIC GAMMA BURSTS; COSMIC RAY SOURCES; DECAY; DENSITY; ENERGY SPECTRA; INTERACTIONS; KEV RANGE; LIFETIME; LIMITING VALUES; MAGNETIC FIELDS; MUONS; NEUTRINOS; PLASMA; RELATIVISTIC RANGE; TWO-DIMENSIONAL CALCULATIONS