- #1
Avogadro Number
- 20
- 2
Hello!
I am studying Zeidler's QFT Volume II, and I have a query on page 808:
It is claimed that
S Ψ^+_{p,s} = (sk)Ψ^+_{p,s} when p=p^3 k.
I tried my hand at deriving this, but when we write S=S^1i+S^2j+S^3k,
then the S^3k term acting on Ψ^+_{p,s} does give skΨ^+_{p,s},
but I don't see why the S^1 i and S^2 j terms don't give any contribution.
To those who are knowledgeable and happen to have access to the book,
could you please help me out? Many thanks!
I am studying Zeidler's QFT Volume II, and I have a query on page 808:
It is claimed that
S Ψ^+_{p,s} = (sk)Ψ^+_{p,s} when p=p^3 k.
I tried my hand at deriving this, but when we write S=S^1i+S^2j+S^3k,
then the S^3k term acting on Ψ^+_{p,s} does give skΨ^+_{p,s},
but I don't see why the S^1 i and S^2 j terms don't give any contribution.
To those who are knowledgeable and happen to have access to the book,
could you please help me out? Many thanks!