New posts in Lorentz Symmetry

Spinors in 2+1 dimensions

How can I tell that a Lagrangian has an $SU(2)\times SU(2)$ symmetry?

One particle states in an interacting theory

Can special relativity be derived from the invariance of the interval?

Poincare representations for interacting field theory

Active transformation and passive transformation of a scalar field

Lorentz invariance of the Minkowski metric

In what sense is BMS a symmetry? (What is kept invariant?)

Lorentz transformation of Gamma matrices $\gamma^{\mu}$

Lorentz-invariance of step function