Fiona McCarthy, Dalila Pîrvu, J. Colin Hill, Junwu Huang, Matthew C. Johnson, Keir K. Rogers
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引用次数: 0
摘要
与标准模型光子进行动力学混合的暗光子会在宇宙微波背景(CMB)中产生新的光谱各向异性(斑块暗屏蔽),这是由于光子在大尺度结构中转换成了暗光子。我们通过对普朗克 CMB 和 unWISE 星系巡天数据的交叉相关性应用最先进的分量分离技术,利用对这种斑块暗屏蔽信号的预测,提供了迄今为止对暗光子动力学混合参数[ϵ≲4.5×10-8(95% 置信度)]在 10-13 eV≲mA′≲10-11 eV 质量范围内的最严格约束,几乎比以前的限制强了一个数量级。
Dark Photon Limits from Patchy Dark Screening of the Cosmic Microwave Background
Dark photons that kinetically mix with the Standard Model photon give rise to new spectral anisotropies (patchy dark screening) in the cosmic microwave background (CMB) due to conversion of photons to dark photons within large-scale structure. We utilize predictions for this patchy dark screening signal to provide the tightest constraints to date on the dark photon kinetic mixing parameter [ (95% confidence level)] over the mass range , almost an order of magnitude stronger than previous limits, by applying state-of-the-art component separation techniques to the cross-correlation of Planck CMB and unWISE galaxy survey data.
期刊介绍:
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