Neutrino emission from gamma-ray burst fireballs, revised.
Neutrino emission from gamma-ray burst fireballs, revised.
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DOI：
10.1103/physrevlett.108.231101
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发表时间：
2011-12
影响因子：
8.6
通讯作者：
S. Hümmer;P. Baerwald;W. Winter
中科院分区：
文献类型：
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作者：
S. Hümmer;P. Baerwald;W. Winter
我们回顾了来自伽马射线爆发的中微子通量，它是从伽马射线观测中估计的，并用于从粒子物理的角度解释最近的冰立方数据。在与解析火球中微子模型相同的天体物理假设下，我们数值计算了中微子通量，包括主要的介子和介子的产生模式、味道混合以及磁场对次级介子、介子和介子的影响。我们证明，考虑到所有谱的全部能量相关性，预期中微子通量的归一化大约减少一个数量级，谱向更高的能量移动，在那里我们可以通过分析模型的重新计算来确定差异的确切来源。我们还复制了冰立方-40对完全相同的爆发和相同的假设的分析，并说明了不确定性的影响。我们的结论是，火球的重子载荷是宇宙线发射的一个重要控制参数，在大约10年后的全尺寸实验中可以得到显著的限制。
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 recomputation of the analytical models. We also reproduce the IceCube-40 analysis for exactly the same bursts and same assumptions and illustrate the impact of 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 significantly with the full-scale experiment after about ten years.