There's a particular particle, the kaon, which can be created. This particle is highly unstable, and so, decays rapidly into other particles. Ever so often, it doesn't decay down the normal route but instead decays into a pion. This is extremely rare (6 in a billion).

In physics, we have what's called the "standard model". It's our best guess as to how physics works at the fundamental level. It's incomplete, however, with multiple slight variations. This decay pathway is interesting because it is quite sensitive to differences between these models. By measuring the energy and ratio of the resulting mess, we can disguard some variants of the model (their predicted energy is too high or too low).

By using a large number of little measurements, like this, scientists can home in on the most accurate "standard model" variant. This, in turn, informs work on a deeper understanding of physics.

Basically, a decade's work to put a single new point onto a graph. A point that only theoretical physicists care about, and might, or might not be useful down the line. Welcome to modern physics.

[–] CheeseNoodle 3 points 2 months ago* (last edited 2 months ago) (1 children)

To be fair those single points are important, they've led to things like nuclear energy and modern computers... come to think of it a lot of our modern technology is rather like the physics equivelent of exploiting an extreme edge case in a game physics engine.

[–] cynar 4 points 2 months ago

I fully agree. It's more the frustration that it now takes so much time and resources to make even a tiny bit of headway.

My favourite example of why pure research is useful, however, is the laser. When it was invented, they had no clue what it could be useful for. It was the classic "solution looking for a problem". It was a fun quirk of quantum mechanics that allowed thek to function. Now, they are critical in multiple areas, but for business and research.

[–] [email protected] 2 points 2 months ago

Thanks for this detailed explainer!