arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2402.18535hep-phastro-ph.HE
收藏

太阳中暗物质束缚态的形成

Dark matter bound-state formation in the Sun

Xiaoyong Chu, Raghuveer Garani, Camilo García-Cely, Thomas Hambye

AI总结:

该研究探讨太阳捕获不对称暗物质后通过辐射亚GeV标量形成束缚态的过程,发现自散射捕获导致暗物质数量指数增长,增强标量发射,其衰变产生的中微子通量可与大气中微子相当,为未来探测提供可能。

摘要:

太阳可能捕获不对称暗物质(DM),这些暗物质随后可通过辐射发射亚GeV标量粒子而形成束缚态。这一过程使得标量粒子的产生无需依赖暗物质湮灭。除了暗物质在核子上的捕获外,负责束缚态形成的暗物质-标量耦合还诱导了环境暗物质粒子与已捕获暗物质粒子以及太阳内原位形成的暗物质束缚态之间的自散射捕获。通过数值和解析求解玻尔兹曼方程,我们对这一情景进行了详细研究。特别地,我们考虑到暗物质自捕获率需要超越传统玻恩近似的处理。我们表明,得益于暗物质在束缚态上的散射,被捕获的暗物质粒子数量呈指数增长,从而通过束缚态形成增强相对论性标量粒子的发射,其最终衰变产物可能是可观测的。我们以标量中介粒子衰变为中微子的例子来探索唯象学特征。我们发现,在低于一百MeV的能量范围内,发射的中微子通量可与大气中微子通量相当。未来的设施如Hyper-K以及直接暗物质探测实验可以进一步检验这一情景。

英文摘要:

The Sun may capture asymmetric dark matter (DM), which can subsequently form bound-states through the radiative emission of a sub-GeV scalar. This process enables generation of scalars without requiring DM annihilation. In addition to DM capture on nucleons, the DM-scalar coupling responsible for bound-state formation also induces capture from self-scatterings of ambient DM particles with DM particles already captured, as well as with DM bound-states formed in-situ within the Sun. This scenario is studied in detail by solving Boltzmann equations numerically and analytically. In particular, we take into consideration that the DM self-capture rates require a treatment beyond the conventional Born approximation. We show that, thanks to DM scatterings on bound-states, the number of DM particles captured increases exponentially, leading to enhanced emission of relativistic scalars through bound-state formation, whose final decay products could be observable. We explore phenomenological signatures with the example that the scalar mediator decays to neutrinos. We find that the neutrino flux emitted can be comparable to atmospheric neutrino fluxes within the range of energies below one hundred MeV. Future facilities like Hyper-K, and direct DM detection experiments can further test such scenario.

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。

↑