论文标题

跨电动轴的热轴产生

Production of Thermal Axions across the ElectroWeak Phase Transition

论文作者

Arias-Aragon, Fernando, D'Eramo, Francesco, Ferreira, Ricardo Z., Merlo, Luca, Notari, Alessio

论文摘要

像中微子一样,光轴可能会留下宇宙背景。我们通过通过两个阶段提供平滑且连续的处理来完成对跨电子量表的热轴产生的研究。为了侧重于保存风味和违反第三代夸克的耦合,我们计算了通过散射和热浴颗粒腐烂产生的轴量。我们根据轴突有效耦合进行独立的模型分析,并且还对特定的显微镜QCD轴心场景进行了预测。这种可观察的效果被参数化,因为它是通过有效数量的其他中微子进行的,高于未来CMB-S4调查的1σ$敏感性。此外,如果一个人在标准模型颗粒与标准模型颗粒之间没有较大的层次结构,则未来的轴轴基螺旋镜将为我们研究的参数区域提供互补的探针。

Light axions can potentially leave a cosmic background, just like neutrinos. We complete the study of thermal axion production across the electroweak scale by providing a smooth and continuous treatment through the two phases. Focusing on both flavor conserving and violating couplings to third generation quarks, we compute the amount of axions produced via scatterings and decays of thermal bath particles. We perform a model independent analysis in terms of axion effective couplings, and we also make predictions for specific microscopic QCD axion scenarios. This observable effect, parameterized as it is conventional by an effective number of additional neutrinos, is above the $1σ$ sensitivity of future CMB-S4 surveys. Moreover, if one assumes no large hierarchies among dimensionless axion couplings to standard model particles, future axion helioscopes will provide a complementary probe for the parameter region we study.

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