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arXiv 1111.6041hep-phastro-ph.HE
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R宇称破缺的引力子暗物质的中微子信号

Neutrino Signals from Gravitino Dark Matter with Broken R-Parity

Michael Grefe

摘要:

引力子是一个很有希望的超对称暗物质候选者,即使没有严格的R-宇称守恒。事实上,只要有一些小的R宇称破坏,引力伴子就有足够长的寿命来构成宇宙的暗物质,而由此产生的宇宙学场景与原始核合成和热稀薄生成所需的高再加热温度是一致的。此外,在这种情况下,引力子是不稳定的,因此可以通过其衰变产物间接检测。在这篇论文中,我们计算了双线性R-宇称破缺模型中引力子的部分衰变宽度。此外,我们还确定了天体物理引力子暗物质衰变的中微子信号。最后,我们讨论了在当前和未来的中微子实验中检测这些中微子信号的可行性,并得出结论这将是一项具有挑战性的任务。尽管如此,如果被探测到,这种独特的信号可能会为引力子暗物质衰变的说法提供相当大的支持。

英文摘要:

The gravitino is a promising supersymmetric dark matter candidate, even without strict R-parity conservation. In fact, with some small R-parity violation, gravitinos are sufficiently long-lived to constitute the dark matter of the universe, while the resulting cosmological scenario is consistent with primordial nucleosynthesis and the high reheating temperature needed for thermal leptogenesis. Furthermore, in this scenario the gravitino is unstable and might thus be accessible by indirect detection via its decay products. We compute in this thesis the partial decay widths for the gravitino in models with bilinear R-parity breaking. In addition, we determine the neutrino signal from astrophysical gravitino dark matter decays. Finally, we discuss the feasibility of detecting these neutrino signals in present and future neutrino experiments, and conclude that it will be a challenging task. Albeit, if detected, this distinctive signal might bring considerable support to the scenario of decaying gravitino dark matter.

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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