Nakai Yuichiro, Namba Ryo, Wang Ziwei
Tsung-Dao Lee Institute and School of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240 China.
Department of Physics, McGill University, Montréal, QC H3A 2T8 Canada.
J High Energy Phys. 2020;2020(12):170. doi: 10.1007/JHEP12(2020)170. Epub 2020 Dec 28.
We discuss the possibility of producing a light dark photon dark matter through a coupling between the dark photon field and the inflaton. The dark photon with a large wavelength is efficiently produced due to the inflaton motion during inflation and becomes non-relativistic before the time of matter-radiation equality. We compute the amount of production analytically. The correct relic abundance is realized with a dark photon mass extending down to 10 eV.
我们讨论了通过暗光子场与暴胀子之间的耦合产生轻暗光子暗物质的可能性。由于暴胀期间暴胀子的运动，具有大波长的暗光子被有效地产生，并在物质 - 辐射相等时间之前变为非相对论性的。我们通过解析计算产生的数量。当暗光子质量低至10电子伏特时，可实现正确的遗迹丰度。
