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Title: UHE neutrino and cosmic ray emission from GRBs: Revising the models and clarifying the cosmic ray-neutrino connection

Gamma-ray bursts (GRBs) have long been held as one of the most promising sources of ultra-high energy (UHE) neutrinos. The internal shock model of GRB emission posits the joint production of UHE cosmic rays (UHECRs, above 10{sup 8} GeV), photons, and neutrinos, through photohadronic interactions between source photons and magnetically-confined energetic protons, that occur when relativistically-expanding matter shells loaded with baryons collide with one another. While neutrino observations by IceCube have now ruled out the simplest version of the internal shock model, we show that a revised calculation of the emission, together with the consideration of the full photohadronic cross section and other particle physics effects, results in a prediction of the prompt GRB neutrino flux that still lies one order of magnitude below the current upper bounds, as recently exemplified by the results from ANTARES. In addition, we show that by allowing protons to directly escape their magnetic confinement without interacting at the source, we are able to partially decouple the cosmic ray and prompt neutrino emission, which grants the freedom to fit the UHECR observations while respecting the neutrino upper bounds. Finally, we briefly present advances towards pinning down the precise relation between UHECRs and UHE neutrinos, includingmore » the baryonic loading required to fit UHECR observations, and we will assess the role that very large volume neutrino telescopes play in this.« less
Authors:
;  [1] ;  [2]
  1. Institut für Physik und Astrophysik, Universität Würzburg, 97074 Würzburg (Germany)
  2. Institut für Physik und Astrophysik, Universität Würzburg, 97074 Würzburg, Germany and Department of Physics and Astrophysics, The Pennsylvania State University, University Park, PA 16802 (United States)
Publication Date:
OSTI Identifier:
22390643
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1630; Journal Issue: 1; Conference: VLVvT 13: 6. International Workshop on Very Large Volumte Neutrino Telescopes, Stockholm (Sweden), 5-7 Aug 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CHERENKOV COUNTERS; COSMIC GAMMA BURSTS; COSMIC NEUTRINOS; COSMIC RAY SOURCES; CROSS SECTIONS; EEV RANGE; MAGNETIC CONFINEMENT; MULTIPARTICLE SPECTROMETERS; NEUTRINO DETECTION; PARTICLE IDENTIFICATION; SCINTILLATION COUNTERS; TELESCOPE COUNTERS