Can one measure the Cosmic Neutrino Background
Can one measure the Cosmic Neutrino Background
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可以测量宇宙中微子背景吗
DOI：
10.1142/s0218301317400080
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
F. Šimkovic
中科院分区：
文献类型：
--
作者：
A. Faessler;R. Hodak;S. Kovalenko;F. Šimkovic
宇宙微波背景（CMB）提供了大爆炸（BB）后大约38万年的宇宙信息。由于中微子与物质的弱相互作用，宇宙中微子背景（CNB）应该提供宇宙早期的信息，大约在大爆炸后一秒。也许最有希望“看到”宇宙中微子背景的方法是氚从背景中捕获电子中微子，然后衰变成3He和一个能量为q值= 18.562 keV的电子中微子加上电子中微子的静止质量。正在准备中的“卡尔斯鲁厄氚中微子”（KATRIN）实验，似乎是目前提出的测量电子反中微子质量的最灵敏的方法。同时，KATRIN还可以通过反应来观察：电子中微子（~1.95开尔文）+ 3H—> 3He + e-（能量Q = 18.6 keV +电子中微子质量）。宇宙背景中微子（CNB）的捕获应该在电子能谱中显示为电子中微子静止质量在q以上的峰值，这里研究了用KATRIN观测到宇宙背景中微子的可能性。KATRIN目前似乎不可能探测到CNB。但是KATRIN应该能够确定CNB局域电子中微子密度的上限。
The Cosmic Microwave Background (CMB) yields information about our Universe at around 380 000 years after the Big Bang (BB). Due to the weak interaction of the neutrinos with matter the Cosmic Neutrino Background (CNB) should give information about a much earlier time of our Universe, around one second after the Big Bang. Probably the most promising method to `see' the Cosmic Neutrino Background is the capture of the electron neutrinos from the Background by Tritium, which then decays into 3He and an electron with the energy of the the Q-value = 18.562 keV plus the electron neutrino rest mass. The `KArlsruhe TRItium Neutrino' (KATRIN) experiment, which is in preparation, seems presently the most sensitive proposed method for measuring the electron antineutrino mass. At the same time KATRIN can also look by the reaction: electron neutrino (~1.95 Kelvin) + 3H --> 3He + e- (with the energy Q = 18.6 keV + electron neutrino mass). The capture of the Cosmic Background Neutrinos (CNB) should show in the electron spectrum as a peak by the electron neutrino rest mass above Q. Here the possibility to see the CNB with KATRIN is studied. A detection of the CNB by KATRIN seems not to be possible at the moment. But KATRIN should be able to determine an upper limit for the local electron neutrino density of the CNB.
影响因子：
3.5
作者：
Amaro-Seoane, Pau;Aoudia, Sofiane;Ward, Henry
通讯作者：
Ward, Henry
影响因子：
8.6
作者：
Ade, P. A. R.;Aikin, R. W.;Yoon, K. W.
通讯作者：
Yoon, K. W.