One such particle is called an axion.

这种粒子叫做轴粒子。

An axion would pass right through you like you weren't there.

轴粒子会穿过你，就像你不在那里一样。

Oh, I see you came around to my idea for distinguishing massive particles from axion particles.

看来你转而支持我的想法了，关于如何区分大质量粒子和轴子。

(Laughter) And whoever chose " the axion" just completely blew it, OK?

（笑声） 谁选择了“轴子”，谁就完全搞砸了，好吗？

If dark matter were made of axions, then clouds of it could be enveloping clusters of galaxies and we'd never see them.

如果暗物质是由轴粒子构成的，那么它的云团就可能包围着星系团，而我们永远也看不到它们。

So how are we going to go looking for the axion or any other dark matter particle?

那么我们如何去寻找轴子或任何其他暗物质粒子呢？

(Laughter) If it's not an axion, you better fix that.

（笑声） 如果它不是轴子，你最好把它修好。

So importantly, axions are bosons, and so now you have a sense of why I like working with them.

重要的是，轴子是玻色子，所以现在你明白为什么我喜欢和它们一起工作了。

Well, in the case of the axion, it helps to pay attention to its quantum classification.

好吧，就轴子而言，关注它的量子分类是有帮助的。

I'm completely enamored with the idea of axion Bose-Einstein condensates.

我完全迷恋轴子玻色-爱因斯坦凝聚态的想法。

It's an axion condensate orbiting a central mass.

它是围绕中心质量运行的轴子凝聚体。

If dark matter is made of axions, then you'd expect it to mostly be surrounding the subclusters themselves, because, like the galaxies, the clouds of dark matter axions would pass right through each other.

如果暗物质是由轴粒子构成的，那么你就会认为它大部分都围绕在亚星团周围，因为就像星系一样，由轴子组成的暗物质云会相互穿过对方。

They've never been detected, but their properties match what we see of dark matter: axions have mass, so if you have a huge cloud of them they'll have enough gravity to affect galaxies.

它们从未被探测到，但它们的性质与我们看到的暗物质的性质一致：轴粒子有质量，所以如果有一个巨大的轴子云，它们将有足够的引力来影响星系。

But the axion is a compelling particle, because it's a twofer: it addresses a problem that we already had, a conflict between theory and experiment in the realm of quark physics.

但轴子是一个引人注目的粒子，因为它是一个二元体：它解决了我们已经遇到的一个问题，即夸克物理学领域的理论与实验之间的冲突。