Use of ANTARES and IceCube Data to Constrain a Single Power-law Neutrino Flux

Use of ANTARES and IceCube Data to Constrain a Single Power-law Neutrino Flux
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使用 ANTARES 和 IceCube 数据约束单个幂律中微子通量

DOI:
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发表时间:
2017
期刊:
影响因子:
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通讯作者:
S. Morisi
S. Morisi
中科院分区:
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文献类型:
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作者:
M. Chianese;R. Mele;G. Miele;P. Migliozzi;S. Morisi

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我们进行了第一次统计分析的扩散中微子通量观测ANTARES(九年)和冰立方(六年)假设一个单一的天体物理幂律通量。组合分析将通量归一化和光谱指数的最佳拟合值降低了百分之几。两个数据样本都显示出相同能量范围(40-200 TeV)的过量,表明存在第二个分量。我们进行拟合优度检验,以审查一个单一的幂律的零假设,扫描不同的值的光谱指数。ANTARES数据的增加使p值降低了一个因子。特别是,中微子通量中的一个幂律分量,其谱指数是由冰立方的六年上升μ介子中微子推导出来的,当p值小于10−2时,它是不利的。
We perform the first statistical combined analysis of the diffuse neutrino flux observed by ANTARES (nine-year) and IceCube (six-year) by assuming a single astrophysical power-law flux. The combined analysis reduces by a few percent the best-fit values for the flux normalization and the spectral index. Both data samples show an excess in the same energy range (40–200 TeV), suggesting the presence of a second component. We perform a goodness-of-fit test to scrutinize the null assumption of a single power-law, scanning different values for the spectral index. The addition of the ANTARES data reduces the p-value by a factor . In particular, a single power-law component in the neutrino flux with the spectral index deduced by the six-year up-going muon neutrinos of IceCube is disfavored with a p-value smaller than 10−2.
DOI: 10.1103/physrevd.89.062007
发表时间: 2014-03-25
期刊: PHYSICAL REVIEW D
影响因子: 5
作者:
Aartsen, M. G.;Abbasi, R.;Zoll, M.
通讯作者: Zoll, M.
DOI: 10.1103/physrevd.91.022001
发表时间: 2015-01-05
期刊: PHYSICAL REVIEW D
影响因子: 5
作者:
Aartsen, M. G.;Ackermann, M.;Zoll, M.
通讯作者: Zoll, M.