论文标题
我们不均匀宇宙中的深色光子振荡
Dark Photon Oscillations in Our Inhomogeneous Universe
论文作者
论文摘要
深色光子可能会与普通光子进行动力学混合，从而诱导振荡，并具有可观察到的宇宙学烙印。如果深色光子质量等于一个普通的光子等离子体质量，则振荡会增强，该光子质量质量质量是普通的光子等离子体质量。先前的研究假设了均匀的宇宙。在这封信中，我们首次介绍了在光子等离子体质量不均匀的情况下治疗共振振荡的分析形式主义。我们使用形式主义来确定从宇宙微波背景光子振荡到深色光子的限制，以及由于暗光子暗物质而引起的原始血浆加热，转化为低能的光子。包括不均匀性的影响表明先前的均匀约束不是保守的，并且同时将当前的实验限制扩展到一个巨大的新参数空间。
A dark photon may kinetically mix with the ordinary photon, inducing oscillations with observable imprints on cosmology. Oscillations are resonantly enhanced if the dark photon mass equals the ordinary photon plasma mass, which tracks the free electron number density. Previous studies have assumed a homogeneous Universe; in this Letter, we introduce for the first time an analytic formalism for treating resonant oscillations in the presence of inhomogeneities of the photon plasma mass. We apply our formalism to determine constraints from Cosmic Microwave Background photons oscillating into dark photons, and from heating of the primordial plasma due to dark photon dark matter converting into low-energy photons. Including the effect of inhomogeneities demonstrates that prior homogeneous constraints are not conservative, and simultaneously extends current experimental limits into a vast new parameter space.
