论文标题
斧头自由球错位机制
Axion Free-kick Misalignment Mechanism
论文作者
论文摘要
我们提出了基于早期宇宙中轴突和光dialaton之间的非平凡相互作用的轴突未对准机制的替代方案。深色物质的丰度仍然是由轴心场的最初未对准来源的，轴心场的最初运动使Dilaton场的最小距离踢开了，而Dilaton随后开始振荡，由于踢球的延迟发作时间延迟开始振荡和相对较大的未对准值。最终，dilaton在能量密度的轴承上占主导地位，而dilaton被识别为暗物质。如果Dilaton的初始场值接近其最小值，则由于轴支运动引起的踢效应最为重要。因此，我们称这种情况为轴心自由球的错位机制，斧头扮演的角色与足球运动员相似。与常规的未对准机制相比，可以以较低的轴突衰减常数获得暗物质丰度。
We propose an alternative scenario for the axion misalignment mechanism based on the nontrivial interplay between the axion and a light dilaton in the early universe. Dark matter abundance is still sourced by the initial misalignment of the axion field, whose motion along the potential kicks the dilaton field away from its minimum, and dilaton starts to oscillate later with a delayed onset time for oscillation and a relatively large misalignment value due to the kick; eventually the dilaton dominates over the axion in their energy densities, and the dilaton is identified as dark matter. The kick effect due to axion motion is the most significant if the initial field value of dilaton is near its minimum; therefore, we call this scenario axion free-kick misalignment mechanism, where axion plays the role similar to a football player. Dark matter abundance can be obtained with a lower axion decay constant compared to the conventional misalignment mechanism.
