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- Homework Statement
- In section Coulomb Potential stated that: "You can easily verify that the other terms mentioned below vanish if ##p = p' = o##"

which we are working in nonrelativistic limit

- Relevant Equations
- $$\bar u(p') \gamma^i u(p)$$

$$\bar u(p') \gamma^i u(p) = u^\dagger(p') \gamma^0 \gamma^i u(p)$$

if ##p = p'## we can use

$$u^\dagger(p) u(p) = 2m \xi^\dagger \xi$$

but how can we conclude the statement?

if ##p = p'## we can use

$$u^\dagger(p) u(p) = 2m \xi^\dagger \xi$$

but how can we conclude the statement?