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= Dirac trace
{c}
{synonym}

A gamma-matrix trace is a <matrix trace> of products of <gamma matrix>[gamma matrices]. In four spacetime dimensions, $\operatorname{tr}(\gamma^\mu\gamma^\nu)=4\eta^{\mu\nu}$ and $\operatorname{tr}(\gamma^\mu\gamma^\nu\gamma^\rho\gamma^\sigma)=4(\eta^{\mu\nu}\eta^{\rho\sigma}-\eta^{\mu\rho}\eta^{\nu\sigma}+\eta^{\mu\sigma}\eta^{\nu\rho})$.

Gamma-matrix trace

Past exam of the mathematics course of the University of Cambridge / 2013 / iii / Paper 45 / 2 / Solution

Past exam of the mathematics course of the University of Cambridge / 2013 / iii / Paper 45 / 3 / Solution

Past exam of the mathematics course of the University of Cambridge / 2018 / iii / Paper 301 / 1 / iii / Solution

Past exam of the mathematics course of the University of Cambridge / 2018 / iii / Paper 301 / 1 / iv / Solution

Past exam of the mathematics course of the University of Cambridge / 2018 / iii / Paper 305 / 4 / a / Solution

Past exam of the mathematics course of the University of Cambridge / 2018 / iii / Paper 305 / 4 / c / i / Solution

Past exam of the mathematics course of the University of Cambridge / 2019 / iii / Paper 301 / 3 / iv / d / Solution

Past exam of the mathematics course of the University of Cambridge / 2019 / iii / Paper 305 / 3 / c / Solution

Past exam of the mathematics course of the University of Cambridge / 2025 / iii / Paper 301 / 3 / a / iv / Solution

Squared-amplitude diagram

codex/dirac-trace

Gamma-matrix trace

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Gamma-matrix trace

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