Tag: group-theory
- Gauge covariant derivative of an adjoint action: $\psi(x) \to g \psi(x) g^{-1}$, instead of a left action $\psi(x)\to e^{iq\theta(x)} \psi(x)$
- Rarita-Schwinger spin projection operators
- Group Theory in a Nutshell for Physicists $SO(2)$ Irreducible Representations Dimensions
- Tachyons as vector representations on the surfaces transitivity of Lorentz group
- Why is group theory important in General Relativity
- The reason for $U(3)_{L} \times U(3)_{R} = U(1)_{V} \times U(1)_{A} \times SU(3)_{L} \times SU(3)_{R}$
- Why can all 4-momenta of fixed length square be constructed by applying a Lorentz transform on a “standard” 4-momentum
- The relationship between the Galilean group and the Poincaré group
- Mixing $SU(N)$ and $U(1)$ generators to form an unbroken $U(1)’$
- Representation theory of $SU(2)$: Left-Right symmetric models