Description

Momentum[p] 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].

See also: DiracGamma, Eps, LorentzIndex, MomentumExpand.

Examples

This is a four dimensional momentum.

As an optional second argument the dimension must be specified if it is different from 4.

The dimension index is supressed in the output.

The FeynCalc Book

MetricTensor

MomentumCombine