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arXiv 2602.03010hep-ph
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从原初黑洞蒸发角度对轻暗物质的约束:暗物质直接探测实验

Constraints on light dark matter from primordial black hole evaporation at dark matter direct detection experiments

School of Physics, Sun Yat-Sen University(中山大学物理学院);School of Physics, Nankai University(南开大学物理学院)

Tong Zhu, Cheng-Rui Jiang, Tong Li, Jiajun Liao

AI总结:

研究通过分析原初黑洞蒸发产生的轻暗物质通量,结合XENONnT、PandaX-4T和LZ实验数据,对暗物质与电子、核素的散射截面及原初黑洞占比进行约束,探讨Hawking蒸发的谱演化。

摘要:

原初黑洞(PBHs)可通过霍金辐射产生轻暗物质(DM)粒子,并产生增强的DM通量,可被地下暗物质直接探测实验探测。我们分析了银河系和星系际对轻DM通量的微分贡献,并计算了PBH增强DM散射电子或核素的预期事件率,考虑了衰减效应。利用XENONnT、PandaX-4T和LZ的最新数据,我们对DM-电子和DM-核素散射截面以及非完全蒸发PBH占比$f_{\rm PBH}$进行了约束,范围为$9\times10^{14}-1\times10^{16}\,\mathrm{g}$。我们还研究了霍金蒸发在整个蒸发和蒸发后阶段引起的谱演化。然后,对PBH质量的约束扩展到$1\times10^{13}-6\times10^{14}\,\mathrm{g}$范围,适用于完全蒸发的PBH。

英文摘要:

Primordial black holes (PBHs) are able to produce light dark matter (DM) particles via Hawking radiation, and yield a flux of boosted DM that can be probed at underground DM direct detection experiments. We analyze both galactic and extragalactic contributions to the differential flux of light DM from PBH evaporation, and then compute the expected event rate from PBH boosted DM scattering off electrons or nuclei after taking into account the attenuation effect. Using recent data from DM direct detection experiments XENONnT, PandaX-4T and LZ, we set constraints on both DM-electron and DM-nucleus scattering cross sections, as well as the fraction of DM composed of PBHs $f_{\rm PBH}$ for $9\times10^{14}-1\times10^{16}\,\mathrm{g}$ PBHs that are not fully evaporated today. We also investigate the spectral evolution induced by Hawking evaporation throughout the evaporation and post-evaporation regimes. The constraints on the PBH mass are then extended into the $1\times10^{13}-6\times10^{14}\,\mathrm{g}$ window for fully evaporated PBHs.

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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