Thanks a lot! Internal symmetry should also be considered. In the beginning part of this article, only Poincare' Symmetry for classification has been mentioned.
Hi,
I am quite naive in Particle Physics, and I have a question that
Can Elementary Particles be related with irreducible representation?
Could we say scalar, vector, and spinor are irreducible representation of SO(3)?
Thanks a lot! I also wish I could have some reference on...
Thanks for your reply.
Now I begin to understand that Cartan-Weyl Basis is specially for semi-simple Lie Algebra, and Killing vector field is another kind of basis (generators).
I have checked amazon.com and listened to advice from my peers.
In the book, "Factorization Method in Quantum...
In quantum mechanics, ladder operators could be constructed within SU(2). The examples should be ladder operators in Quantum Harmonic Oscillator and ladder operators in angular part of Hydrogen Atom (Lx + i Ly, Lx - i Ly).
In Field Theory, QED SU(2) and QCD SU(3), the creation and...