路在何方——μ子磁矩实验的启迪

Where Is Our Road?

粒子物理的标准模型取得了巨大成功,但它含有25个自由参数确实不美,在认识论层面上,问题众多,层出不穷。为何规范群是目前的选取?为何费米子只有3代?为何只有左手费米子才参与弱作用?希格斯粒子势又为何如此?新近,美国费米实验室进行了一项μ子g-2实验,发现μ子磁矩的实验值和理论值不符,这可能预示着超越标准模型。

The recent experimental and theoretical results of muon’s magnetic moment shook up the whole physics world because there is a slight deviation.How can we build a theory that is even better than the standard model to resolve this issue?As yet,nobody knows,but we take a look at some routes towards possible answers.