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The black vegetable
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I am looking at Srednicki ch 64 , how does equation 64.1 follow from 64.3 as stated.
Explicitly in QED how does
##
u_{s'}(p')V^{u}(p',p)u_{s}(p)=e\bar{u'}(F_{1}(q^{2})\gamma ^{u}-\frac{i}{m}F_{2}(q^{2})S^{uv}q_{v})u
##
follow from the quantum action
##
\Gamma =\int d^{4}x(eF_{1}\bar{\varphi }\not{A}\varphi+\frac{e}{2m}F_{2}(0)F_{uv}\bar{\varphi }S^{uv}\varphi + ...
##
Where the… represent more derivatives
Is it from the derivative expansion of the quantum action, (chapter 21 equation 21.19)
Many thanks
Explicitly in QED how does
##
u_{s'}(p')V^{u}(p',p)u_{s}(p)=e\bar{u'}(F_{1}(q^{2})\gamma ^{u}-\frac{i}{m}F_{2}(q^{2})S^{uv}q_{v})u
##
follow from the quantum action
##
\Gamma =\int d^{4}x(eF_{1}\bar{\varphi }\not{A}\varphi+\frac{e}{2m}F_{2}(0)F_{uv}\bar{\varphi }S^{uv}\varphi + ...
##
Where the… represent more derivatives
Is it from the derivative expansion of the quantum action, (chapter 21 equation 21.19)
Many thanks