论文标题
各向异性宇宙光学背景绑定了衰减暗物质的lorri异常
Anisotropic cosmic optical background bound for decaying dark matter in light of the LORRI anomaly
论文作者
论文摘要
最近，新的视野观察结果报道了宇宙光学背景（COB）中的异常通量。 cob通量为$ 16.37 \ pm 1.47 \，\ rm nw m^{ - 2} sr^{ - 1} $，在lorri Pivot波长$ 0.608 \，\rmμm$上，$ \ rmμm$，是$ \ sim4σ$高于$ \ sim4σ$的级别，超过了$ \ sim frove the Hubble Space telescopey（Hubble Space tareScopey（HS）。如果这是EV量表暗物质腐烂到光子的暗示，那就太好了。在本文中，我们指出，这种腐烂的暗物质模型预测了COB通量中的大量各向异性，这是由HST准确测量的。 HST的数据不包括大于$ 10^{ - 24} $ - $ 10^{ - 23} \，{\ rm s}^{ - 1} $的主要冷暗物质的衰减速率，在$ 5 $ - $ 20 $ 20 $ 20 $ ev中。结果，腐烂的暗物质解释了棒质量的过量。我们讨论一些漏洞：例如温暖/热的暗物质或暗物质的两步衰减，以解释棒的多余。
Recently anomalous flux in the cosmic optical background (COB) has been reported by the New Horizon observations. The COB flux is $16.37\pm 1.47\, \rm nW m^{-2} sr^{-1}$, at the LORRI pivot wavelength of $0.608\,\rm μm$, which is $\sim 4σ$ level above the expected flux from the Hubble Space Telescope (HST) galaxy count. It would be great if this were a hint for the eV scale dark matter decaying into photons. In this paper, we point out that such a decaying dark matter model predicts a substantial amount of anisotropy in the COB flux, which is accurately measured by the HST. The data of the HST excludes the decay rate of the dominant cold dark matter larger than $10^{-24}$-$10^{-23}\,{\rm s}^{-1}$ in the mass range of $5$-$20$eV. As a result, the decaying cold dark matter explaining the COB excess is strongly disfavored by the anisotropy bound. We discuss some loopholes: e.g. warm/hot dark matter or two-step decay of the dark matter, to explain the COB excess.
