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arXiv 2103.08626hep-phastro-ph.COastro-ph.HEgr-qc
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广义$CPT$ -对称早期宇宙学中的无菌中微子暗物质

Sterile Neutrino Dark Matter from Generalized $CPT$-Symmetric Early-Universe Cosmologies

Adam Duran, Logan Morrison, Stefano Profumo

摘要:

我们将辐射主导的$CPT$对称宇宙中的引力粒子产生推广到非标准的,但也是$CPT$对称的早期宇宙宇宙学。我们计算了右手“不育”中微子成为宇宙学暗物质所需的质量。由于一般的无菌中微子与标准模型的活性中微子混合,我们使用最先进的工具来计算超重无菌中微子暗物质衰变的伽马射线和高能活性中微子的预期光谱。我们证明了在早期宇宙中,无菌中微子从未处于热平衡。我们表明,非常高的能量切伦科夫望远镜可能会检测到一个信号的无菌中微子寿命高达约10 $^{27}$ s,而在高能量中微子望远镜,如冰立方的信号可以检测到的寿命高达10 $^{30}$ s,提供了一个更好的机会,在一个广阔的景观可能的质量检测。

英文摘要:

We generalize gravitational particle production in a radiation-dominated $CPT$-symmetric universe to non-standard, but also $CPT$-symmetric early universe cosmologies. We calculate the mass of a right-handed "sterile" neutrino needed for it to be the cosmological dark matter. Since generically sterile neutrinos mix with the Standard Model active neutrinos, we use state-of-the-art tools to compute the expected spectrum of gamma rays and high-energy active neutrinos from ultra-heavy sterile neutrino dark matter decay. We demonstrate that the sterile neutrinos are never in thermal equilibrium in the early universe. We show that very high-energy Cherenkov telescopes might detect a signal for sterile neutrino lifetimes up to around 10$^{27}$ s, while a signal in high-energy neutrino telescopes such as IceCube could be detectable for lifetimes up to 10$^{30}$ s, offering a better chance of detection across a vast landscape of possible masses.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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