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- · arXiv e-print (arXiv:1009.4010)
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| Title: |
| Magnetic Field and Flavor Effects on the Gamma-Ray Burst Neutrino Flux |
| Authors: |
| Baerwald, Philipp; Hümmer, Svenja; Winter, Walter |
| Publication: |
| eprint arXiv:1009.4010 |
| Publication Date: |
| 09/2010 |
| Origin: |
| ARXIV |
| Keywords: |
| Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology |
| Comment: |
| 9 pages, 3 figures |
| Bibliographic Code: |
| 2010arXiv1009.4010B |
Abstract
We reanalyze the prompt muon neutrino flux from gamma-ray bursts (GRBs) in terms of the particle physics involved. We first reproduce the often used reference Waxman-Bahcall GRB flux assuming photo-meson production by the Delta(1232) resonance, including synchrotron energy losses of the secondary pions explicitly. Then we switch on additional neutrino production modes, we include the neutrinos from muon decays, we include the magnetic field effects on all secondary species, and we apply flavor mixing including the current parameter uncertainties. We demonstrate that the combination of these effects modifies the shape of the original Waxman-Bahcall GRB flux significantly, and changes the normalization by up to one order of magnitude. As a consequence, the gamma-ray burst search strategy of neutrino telescopes may be based on the wrong flux shape, and the constraints derived for the GRB neutrino flux, such as the baryonic loading, may in fact be already much stronger than anticipated. Moreover, a neutrino flux from kaon decays is expected in the Auger-observable energy range.
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