Can anyone explain Lie groups and why they are important to the standard model?
>>7794327
https://en.wikipedia.org/wiki/Lie_group
https://en.wikipedia.org/wiki/Lie_algebra
https://en.wikipedia.org/wiki/Gauge_theory
https://en.wikipedia.org/wiki/Yang%E2%80%93Mills_theory
l2google
>>7794327
Quantum physics is a lie invented in the 1920's by a group of physicists. This group is called the "Lie Group".
>why they are important to the standard model
Except maybe the math of statistical physics, Lie groups are important everywhere in physics. I used to say mechanics and field(classical and quantum) theory is applied representation theory of a view Lie groups
>>7794500
there are even specific entries, such as
https://en.wikipedia.org/wiki/Particle_physics_and_representation_theory
>>7796286
11/10
Any Unitary matrix can be written as the matrix exponential of i times a hermitian matrix. This guarantees we can write any transformation of the SU(n) symmetry group in a way that can be: (1) expanded and used in a perturbative theory; (2) related to a physical observable through the postulates of QM. Also, the fundamental representation of the matrix Lie Groups are actually really easy to derive.
You should really study Yang-Mills, OP.
>>7794327
Because of QCD we can build certain "groups" of particles with sameish attributes. This is helpful to make things easier
Besides that
>muh commutators