- #1

victorvmotti

- 155

- 5

Or for an arbitrary representation of the Clifford algebra:

$$ P: \psi_{+} \to \psi_{-} $$

Where

$$ \psi_{+}$$ and $$ \psi_{-} $$ are projections of the Dirac spinor $$\psi$$

But this is unclear to me.

To prove he says:

****Under parity, rotations don't change sign. But boosts do flip sign.****

Again this isn't clear. We are talking about a discrete Lorentz transformation, i.e. parity, on spacetime which is neither a rotation nor a boost. But why we are mixing them up? I mean a rotation and boost on the Dirac spinor?