IN Srednicki's QFT he seems to make two different choices for normalizing the generators of lie algebras. In chapter 24 (eqn 24.5) he chooses Tr (T(adsbygoogle = window.adsbygoogle || []).push({}); ^{a}T^{b}) = 2 δ^{ab}and in chapter 69 (eqn 69.8) he chooses Tr (T^{a}T^{b}) = (1/2) δ^{ab}

Is there a reason for this? Is there any particular reason to make one choice over the other?

Thanks

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# A Srednicki's normalization choice for lie algebra generators

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