FEYN CALC SYMBOL

FermionSpinSum


constructs the Traces out of squared ampliudes.

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Basic Examples  (1)Basic Examples  (1)

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Spinors of fermions of mass m are normalized to have square 2 m or -2 m.
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Notice that SpinorUBar and SpinorU are only input functions. Internally they are converted to Spinor objects.
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