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Axion Kinetic Misalignment Mechanism.
Physical Review Letters ( IF 8.1 ) Pub Date : 2020-06-26 , DOI: 10.1103/physrevlett.124.251802
Raymond T Co 1 , Lawrence J Hall 2, 3 , Keisuke Harigaya 4
Affiliation  

In the conventional misalignment mechanism, the axion field has a constant initial field value in the early Universe and later begins to oscillate. We present an alternative scenario where the axion field has a nonzero initial velocity, allowing an axion decay constant much below the conventional prediction from axion dark matter. This axion velocity can be generated from explicit breaking of the axion shift symmetry in the early Universe, which may occur as this symmetry is approximate.

中文翻译:

轴力动力学失准机制。

在常规的未对准机制中,轴场在早期的宇宙中具有恒定的初始场值,随后开始振荡。我们提出了一种替代方案,其中轴力场具有非零的初始速度,从而使轴力衰减常数大大低于根据轴力暗物质的常规预测。该轴速可以由早期宇宙中轴位移对称性的明显破坏而产生,这种对称对称性可能是近似的。
更新日期:2020-06-26
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