[aatd86]

Isn't it the mathematics that is lagging? Amplituhedron? Higher dimensional models?

Fun fact: I got to read the thesis of one my uncles who was a young professor back in the 90's. Right when they were discovering bosons. They were already modelling them as tensors back then. And probably multilinear transformations.

Now that I am grown I can understand a little more, I was about 10 years old back then. I had no idea he was studying and teaching the state of the art. xD

[elzbardico]

Tensors are pretty old in physics; they are a central concept in Einstein's General Relativity.

You can find tensors even in some niche stuff in macroeconomics.

[ecshafer]

Tensors are like 200 years old in mathematics. Gauss talked about Tensors.

[aatd86]

What was new was not tensors. It was the representation in SU of mesons for photon-photon collisions. But even saying that is skimming the surface. I can't read beyond the knowledge gap.