暗物质扩散了超新星中微子背景

IF 5.9 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-10-02 DOI:10.1088/1475-7516/2025/10/020

Garv Chauhan, R. Andrew Gustafson, Gonzalo Herrera, Taj Johnson and Ian M. Shoemaker

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引用次数: 0

摘要

我们考虑中微子从银河系暗物质中散射，以及这种散射对超新星中微子的影响。这可以表现为中微子初始通量的衰减和散射中微子的延时通量。考虑到100兆电子伏以上的暗物质质量和过去的银河系超新星，我们发现这种时间延迟通量在时间上几乎是恒定的。我们将这种通量称为暗物质扩散超新星中微子背景（DMDSNB），并使用漫射超新星中微子背景（DSNB）通量的Super-K限制来设置暗物质-中微子散射截面的限制。我们发现，当mDM > 1 GeV时，σDM-ν/mDM > 2.4 × 10-24cm2/GeV，这是迄今为止关于MeV能量下暗物质-中微子散射的最强束缚，并且比SN1987A中微子衰减设定的束缚强一个数量级。最后，我们将讨论如何区分DMDSNB和DSNB。

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The dark matter diffused supernova neutrino background

We consider neutrinos scattering off Milky Way dark matter and the impact of this scattering on supernovae neutrinos. This can take the form of attenuation on the initial flux of neutrinos and a time-delayed flux of scattered neutrinos. Considering dark matter masses above 100 MeV and past Milky Way supernovae, we find this time-delayed flux is nearly constant in time. We call this flux the Dark Matter Diffused Supernova Neutrino Background (DMDSNB), and use Super-K limits on the Diffuse Supernova Neutrino Background (DSNB) flux to set limits on the dark matter-neutrino scattering cross section. We find σDM-ν/mDM ≲ 2.4 × 10-24cm2/GeV for mDM ≳ 1 GeV, which is the strongest bound to date on dark matter-neutrino scatterings at MeV energies, and stronger than bounds set from SN1987A neutrino attenuation by an order of magnitude. We end by discussing how the DMDSNB could be distinguished from the DSNB.

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来源期刊

Journal of Cosmology and Astroparticle Physics 地学天文-天文与天体物理

CiteScore

10.20

自引率

23.40%

发文量

632

审稿时长

1 months

期刊介绍： Journal of Cosmology and Astroparticle Physics (JCAP) encompasses theoretical, observational and experimental areas as well as computation and simulation. The journal covers the latest developments in the theory of all fundamental interactions and their cosmological implications (e.g. M-theory and cosmology, brane cosmology). JCAP''s coverage also includes topics such as formation, dynamics and clustering of galaxies, pre-galactic star formation, x-ray astronomy, radio astronomy, gravitational lensing, active galactic nuclei, intergalactic and interstellar matter.