289 | Cari Cesarotti on the Next Generation of Particle Experiments

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Sean Carroll 0:00
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Sean Carroll 2:18
Hello, everyone. Welcome to the Mindscape Podcast. I'm your host, Sean Carroll. In science, when things are going well, there is an interplay between theory and experiment. Experimenters notice something about the world. Theorists rush to offer an explanation or many explanations for those phenomena. The experimenters go out and test the predictions of the theory. They discover even new things. The theorists are called in again, and it keeps going back and forth. But occasionally, in fact, I would say almost never, but sometimes, one can be the victim of one's own success. And that is the story of modern particle physics. In the 50s, 60s, 70s, we were just splashed with all sorts of experimental results that were very puzzling, very interesting, very intriguing, very hard to explain.
Sean Carroll 3:06
We put together a theory, the standard model of particle physics. And then something happened that almost never happens in science, which is that we kept collecting data. The experimenters have not slowed down. They've not gotten worse at their job. They're probing the universe in regimes where we have not yet probed it. But the new data is still in line with the standard model, with the theory that we put together back in the 60s and 70s. The capstone of this, of course, was the discovery in 2012 of the Higgs boson, something that was predicted to exist back in the 1960s, with more or less the same properties that we'd predicted it should have back in the 1960s. Despite that success, there are plenty of reasons to think the Standard Model is not the final answer. Of course, it doesn't include gravity as a fully quantum mechanical theory, but also what is the dark matter? Why are there so many particles? Why do they have the numbers that they have? Why is there more matter than antimatter?

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