Quantum Field Theory and the Standard Model by Schwartz M.D. z-lib.org · Problem 2.4

Lorentz invariance and second quantization — Schwartz M.D. z-lib.org

Physics — QFT · discrete-lorentz-transformations

Problem

Is the transformation

Y : (t, x, y, z) \to (t, x, -y, z)

a Lorentz transformation? If so, why is it not considered with

P

and

T

as a discrete Lorentz transformation? If not, why not?