FEYN CALC SYMBOL

Momentum


is the head of a four momentum (p). The internal representation of a four-dimensional p is Momentum[p]. For other than four dimensions: Momentum[p, dim]. Momentum[p, 4] simplifies to Momentum[p].

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Basic Examples  (1)Basic Examples  (1)

This is a four dimensional momentum.
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As an optional second argument the dimension must be specified if it is different from 4.
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The dimension index is supressed in the output.
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