Indirect dark matter searches at ultrahigh energy neutrino detectors
Indirect dark matter searches at ultrahigh energy neutrino detectors
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DOI：
10.1103/physrevd.104.083002
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发表时间：
2021-06
影响因子：
5
通讯作者：
C. Guépin;R. Aloisio;A. Cummings;L. Anchordoqui;J. Krizmanic;A. Olinto;M. Reno;T. Venters
中科院分区：
文献类型：
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作者：
C. Guépin;R. Aloisio;A. Cummings;L. Anchordoqui;J. Krizmanic;A. Olinto;M. Reno;T. Venters
高能到超高能中微子探测器可以通过寻找湮没和/或衰变过程产生的次级产物来独特地探测暗物质 $\chi$ 的特性。我们评估了 POEMMA 和 GRAND 等下一代天文台对暗物质热平均湮没截面 $\langle\sigma v\rangle$ 的敏感性以及中微子 $\Gamma_{\chi\rightarrow\nu\bar{\nu}}$ 的部分衰变宽度（质量尺度 $10^7 \leq m_\chi/{\rm GeV} \leq 10^{15}$）。我们表明，在 $ 10^7 \leq m_\chi/{\rm GeV} \leq 10^{11}$ 范围内，像 POEMMA 这样的天基切伦科夫探测器具有全天空覆盖和快速回转的优势，能够实现专注于银河系中心的优化暗物质观测策略。我们还表明，GRAND 等地面无线电探测器可以在无线电安静区域实现高灵敏度和高占空比。我们将下一代中微子实验的灵敏度与 IceCube 的现有约束进行比较，并更新了 90\% C.L.使用 Pierre Auger Collaboration 和 ANITA 的结果计算 $\langle\sigma v\rangle$ 和 $\Gamma_{\chi\rightarrow\nu\bar{\nu}}$ 的上限。我们表明，在 $ 10^7 \leq m_\chi/{\rm GeV} \leq 10^{11}$ 范围内，POEMMA 和 GRAND10k 将使中微子对粒子暗物质的敏感性比现有限制提高 2 到 10 倍，而 GRAND200k 会将这种敏感性提高两个数量级。在 $10^{11} \leq m_\chi/{\rm GeV} \leq 10^{15}$ 范围内，POEMMA 的荧光观测模式将实现对暗物质特性前所未有的敏感度。最后，我们使用银河参数的最新拟合和估计来强调与银河晕中暗物质分布相关的不确定性的重要性。
High to ultrahigh energy neutrino detectors can uniquely probe the properties of dark matter $\chi$ by searching for the secondary products produced through annihilation and/or decay processes. We evaluate the sensitivities to dark matter thermally averaged annihilation cross section $\langle\sigma v\rangle$ and partial decay width into neutrinos $\Gamma_{\chi\rightarrow\nu\bar{\nu}}$ (in the mass scale $10^7 \leq m_\chi/{\rm GeV} \leq 10^{15}$) for next generation observatories like POEMMA and GRAND. We show that in the range $ 10^7 \leq m_\chi/{\rm GeV} \leq 10^{11}$, space-based Cherenkov detectors like POEMMA have the advantage of full-sky coverage and rapid slewing, enabling an optimized dark matter observation strategy focusing on the Galactic center. We also show that ground-based radio detectors such as GRAND can achieve high sensitivities and high duty cycles in radio quiet areas. We compare the sensitivities of next generation neutrino experiments with existing constraints from IceCube and updated 90\% C.L. upper limits on $\langle\sigma v\rangle$ and $\Gamma_{\chi\rightarrow\nu\bar{\nu}}$ using results from the Pierre Auger Collaboration and ANITA. We show that in the range $ 10^7 \leq m_\chi/{\rm GeV} \leq 10^{11}$ POEMMA and GRAND10k will improve the neutrino sensitivity to particle dark matter by factors of 2 to 10 over existing limits, whereas GRAND200k will improve this sensitivity by two orders of magnitude. In the range $10^{11} \leq m_\chi/{\rm GeV} \leq 10^{15}$, POEMMA's fluorescence observation mode will achieve an unprecedented sensitivity to dark matter properties. Finally, we highlight the importance of the uncertainties related to the dark matter distribution in the Galactic halo, using the latest fit and estimates of the Galactic parameters.