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arXiv 1009.4010astro-ph.HEhep-ph
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磁场和味效应对伽马射线暴中微子通量的影响

Magnetic Field and Flavor Effects on the Gamma-Ray Burst Neutrino Flux

Philipp Baerwald, Svenja Hümmer, Walter Winter

摘要:

以Waxman-Bahcall GRB通量为例,从粒子物理的角度重新分析了伽马射线暴中的瞬发μ中微子通量。我们首先重现这个参考通量处理同步能量损失的二级π介子明确。然后,我们包括额外的中微子生产模式,中微子从μ子衰变,磁场的影响,对所有的次要物种,和味道混合与当前参数的不确定性。我们表明,这些影响的组合修改的形状的原始韦克斯曼-巴卡尔伽玛射线暴通量显着,并改变归一化的三到四个因素。因此,中微子望远镜的伽马射线暴搜索策略可能是基于错误的通量形状,而对伽玛射线暴中微子通量的限制,如重子载荷,实际上可能已经比预期的要强得多。

英文摘要:

We reanalyze the prompt muon neutrino flux from gamma-ray bursts (GRBs), at the example of the often used reference Waxman-Bahcall GRB flux, in terms of the particle physics involved. We first reproduce this reference flux treating synchrotron energy losses of the secondary pions explicitly. Then we include additional neutrino production modes, the neutrinos from muon decays, the magnetic field effects on all secondary species, and flavor mixing with 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 a factor of three to four. 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.

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