Hümmer, Svenja 2011 伽马暴火球中的中微子辐射

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Title:		Neutrino Emission from Gamma-Ray Burst Fireballs, Revised
Authors:		Hümmer, Svenja; Baerwald, Philipp; Winter, Walter
Publication:		eprint arXiv:1112.1076
Publication Date:		12/2011
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology
Comment:		4 pages, 3 figures
Bibliographic Code:		2011arXiv1112.1076H

Abstract

We review the neutrino flux from gamma-ray bursts, which is estimated from gamma-ray observations and used for the interpretation of recent IceCube data, from a particle physics perspective. We numerically calculate the neutrino flux for the same astrophysical assumptions as the analytical fireball neutrino model, including the dominant pion and kaon production modes, flavor mixing, and magnetic field effects on the secondary muons, pions, and kaons. We demonstrate that taking into account the full energy dependencies of all spectra, the normalization of the expected neutrino flux reduces by about one order of magnitude and the spectrum shifts to higher energies, where we can pin down the exact origin of the discrepancies by the re-computation of the analytical models. We also reproduce the IceCube-40 analysis for exactly the same bursts and same assumptions and illustrate the impact of systematical uncertainties. We conclude that the baryonic loading of the fireballs, which is an important control parameter for the emission of cosmic rays, can be constrained beyond the expectation with the full-scale experiment after about nine years.

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