论文标题
天体轴承模型的重新归一化组效应
Renormalization group effects in astrophobic axion models
论文作者
论文摘要
最近指出的是，在某些轴突模型中，可以同时抑制轴突耦合到核子和电子的轴承耦合，从而实现所谓的天体轴心轴心场景，其中SN1987A的紧密界限以及红色巨人和白色dwarfs的恒定进化都非常放松。然而，到目前为止，仅在树级分析中列出了实现天体恐惧症的条件。在这里，我们研究了一旦轴突耦合的运行，一旦重新归一化组的效应包括在内，这些条件是否仍然可以始终如一地实现。我们发现，尽管在相当不同的参数空间区域内，轴心天体恐惧症仍在保持持有量，并且我们为此结果提供了分析见解。鉴于天体轴承模型通常具有违反风味的轴突耦合，我们还评估了重新归一化组对轴突介导的违反可观察结果的影响的影响。
It has been recently pointed out that in certain axion models it is possible to suppress simultaneously both the axion couplings to nucleons and electrons, realising the so-called astrophobic axion scenarios, wherein the tight bounds from SN1987A and from stellar evolution of red giants and white dwarfs are greatly relaxed. So far, however, the conditions for realising astrophobia have only been set out in tree-level analyses. Here we study whether these conditions can still be consistently implemented once renormalization group effects are included in the running of axion couplings. We find that axion astrophobia keeps holding, albeit within fairly different parameter space regions, and we provide analytical insights into this result. Given that astrophobic axion models generally feature flavour violating axion couplings, we also assess the impact of renormalization group effects on axion-mediated flavour violating observables.
