Griffiths Introduction to Elementary Particles · Problem 7.4

Electrodynamics of Quarks and Hadrons — David J. Griffiths

Physics — QFT · dirac-spinor-orthogonality

Problem

Show that

u^{(1)}

and

u^{(2)}

[eq. (7.46)] are orthogonal in the sense that

u^{(1)\dagger}u^{(2)} = 0

. Likewise, show that

u^{(3)}

and

u^{(4)}

are orthogonal. Are

u^{(1)}

and

u^{(3)}

orthogonal?