Probing relic neutrino radiative decays with 21 cm cosmology
Probing relic neutrino radiative decays with 21 cm cosmology
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DOI：
10.1016/j.physletb.2018.09.040
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发表时间：
2019-03-10
影响因子：
4.4
通讯作者：
Samanta, R.
中科院分区：
文献类型：
--
作者：
Chianese, M.;Di Bari, P.;Samanta, R.
我们展示了如何21厘米宇宙学可以测试遗迹中微子辐射衰变成不育中微子。利用最近的EDGES结果，我们得到的衰减中微子的寿命的限制。如果EDGES异常将被证实，那么有两个解决方案，一个是比宇宙年龄长得多的寿命，另一个是比宇宙年龄短得多的寿命，这表明残余中微子辐射衰变可以以简单的方式解释异常。我们还展示了如何将联合收割机的EDGES结果与来自射电背景观测的结果相结合，表明在拟议的非标准宇宙学情景中，ARCADE 2过剩也可以与EDGES异常一起再现。我们对EDGES探测到的红移处的比强度的计算也可以应用于衰变暗物质的情况。(C)2018作者由爱思唯尔公司出版
We show how 21 cm cosmology can test relic neutrino radiative decays into sterile neutrinos. Using recent EDGES results, we derive constraints on the lifetime of the decaying neutrinos. If the EDGES anomaly will be confirmed, then there are two solutions, one for much longer and one for much shorter lifetimes than the age of the universe, showing how relic neutrino radiative decays can explain the anomaly in a simple way. We also show how to combine EDGES results with those from radio background observations, showing that potentially the ARCADE 2 excess can be also reproduced together with the EDGES anomaly within the proposed non-standard cosmological scenario. Our calculation of the specific intensity at the redshifts probed by EDGES can be also applied to the case of decaying dark matter. (C) 2018 The Authors. Published by Elsevier B.V.