3 ms·
>The Standard Model is a single Lagrangian with a couple of dozen constants. I hear it's a bit more complex than that! https://www.sciencealert.com/this-is-wh
by baxtr 2y ago
>The Standard Model is a single Lagrangian with a couple of dozen constants.
I hear it's a bit more complex than that!
https://www.sciencealert.com/this-is-what-the-standard-model-of-physics-actually-looks-like https://www.sciencealert.com/this-is-what-the-standard-model...
- l33tman 2y agoIt's a single lagrangian with a couple of dozen constants, in their pics there as well. It's just expanded out to different degrees.
- baxtr 2y agoThrough smart definitions I can contract any longer term as much as I want.
- l33tman 2y agoYes, and it's exactly those "smart definitions" that are the Standard Model. The whole goal is to produce even smarter definitions, including showing that as much as possible of it couldn't be any other way, preferably.
- Vampiero 2y agoYes and that's precisely why you're writing high-level code instead of ASM. It's your job.
- ajkjk 2y agoNah it really is simpler than that, that picture has exploded the summations to make it look complicated. Although it is strangely hard to find the compressed version written down anywhere... the thing about Lagrangians is that they compose systems by adding terms together: L_AB = L_A + L_B if A and B don't interact. Each field acts like an independent system, plus some interaction terms if the fields interact. So most of the time, e.g. on Wikipedia[0], people write down the terms in little groups. But still, note on the Wikipedia page that there are not that many terms in the Lagrangian section, due to the internal summations. [0]: https://en.wikipedia.org/wiki/Mathematical_formulation_of_the_Standard_Model#Lagrangian_formalism https://en.wikipedia.org/wiki/Mathematical_formulation_of_th...