IceCube neutrinos, decaying dark matter, and the Hubble constant
IceCube neutrinos, decaying dark matter, and the Hubble constant
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DOI：
10.1103/physrevd.94.069901
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发表时间：
2015-06
影响因子：
5
通讯作者：
L. Anchordoqui;V. Barger;H. Goldberg;Xing Huang;D. Marfatia;Luiz H. M. da Silva;T. Weiler
中科院分区：
文献类型：
--
作者：
L. Anchordoqui;V. Barger;H. Goldberg;Xing Huang;D. Marfatia;Luiz H. M. da Silva;T. Weiler
从普朗克对宇宙微波背景各向异性的测量中推断出的宇宙学参数与低红移下各种参数的直接天文测量存在一定的张力。最近，有人推测，如果有一部分暗物质是不稳定的，并且在重组和现在的时代之间衰变，那么这种差异就可以得到调和。在这里，我们表明，如果超重遗迹有分支成中微子B (X \to\nu\bar\nu) \sim 3 \times 10^{-9}，那么这种情况也可以容纳最近发现的外星中微子通量，从而缓解冰立方结果和费米LAT数据之间的紧张关系。该模型是完全可预测的，可以面对未来的冰立方数据。我们证明，在10年的观测冰立方将能够区分单能量信号从X衰减在3 \sigma水平。经过几年的数据采集，升级后的冰立方- gen2将收集到足够的统计数据，以阐明暗物质-中微子在5 \sigma级别的联系。
Cosmological parameters deduced from the Planck measurements of anisotropies in the cosmic microwave background are at some tension with direct astronomical measurements of various parameters at low redshifts. Very recently, it has been conjectured that this discrepancy can be reconciled if a certain fraction of dark matter is unstable and decays between recombination and the present epoch. Herein we show that if the superheavy relics have a branching into neutrinos B (X \to \nu \bar \nu) \sim 3 \times 10^{-9}, then this scenario can also accommodate the recently discovered extraterrestrial flux of neutrinos, relaxing the tension between IceCube results and Fermi LAT data. The model is fully predictive and can be confronted with future IceCube data. We demonstrate that in 10 years of observation IceCube will be able to distinguish the mono-energetic signal from X decay at the 3\sigma level. In a few years of data taking with the upgraded IceCube-Gen2 enough statistics will be gathered to elucidate the dark matter--neutrino connection at the 5\sigma level.