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

Journal Article · Tue Nov 18 00:00:00 EST 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4902776· OSTI ID:22390643

Bustamante, Mauricio; Winter, Walter ^[1]; Baerwald, Philipp ^[2]

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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)

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, including the baryonic loading required to fit UHECR observations, and we will assess the role that very large volume neutrino telescopes play in this.

• OSTI ID: 22390643
• Journal Information: AIP Conference Proceedings, Vol. 1630, 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); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

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