Predictions for axion couplings from ALP cogenesis
Predictions for axion couplings from ALP cogenesis
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DOI：
10.1007/jhep01(2021)172
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发表时间：
2021-01-26
影响因子：
5.4
通讯作者：
Harigaya, Keisuke
中科院分区：
文献类型：
--
作者：
Co, Raymond T.;Hall, Lawrence J.;Harigaya, Keisuke
在标准模型中加入类轴子粒子（ALP），在早期宇宙中具有场速度，同时解释了观察到的重子和暗物质密度。这需要ALP与光子、核子和/或电子之间的一个或多个耦合，这些耦合被预测为ALP质量的函数。这些预测的出现是因为暗物质与重子密度的比率与ALP场速度无关，允许ALP质量m（a）和衰变常数f（a）之间的相关性。预测的耦合的数量级大于那些为QCD轴子和暗物质从传统的ALP错位机制。因此，这个方案，ALP共生，是在未来的实验ALP搜索从实验室和恒星的对象，并为暗物质。
Adding an axion-like particle (ALP) to the Standard Model, with a field velocity in the early universe, simultaneously explains the observed baryon and dark matter densities. This requires one or more couplings between the ALP and photons, nucleons, and/or electrons that are predicted as functions of the ALP mass. These predictions arise because the ratio of dark matter to baryon densities is independent of the ALP field velocity, allowing a correlation between the ALP mass, m(a), and decay constant, f(a). The predicted couplings are orders of magnitude larger than those for the QCD axion and for dark matter from the conventional ALP misalignment mechanism. As a result, this scheme, ALP cogenesis, is within reach of future experimental ALP searches from the lab and stellar objects, and for dark matter.