MomentumExpand

Description

MomentumExpand[expr] expands Momentum[a+b+ ...] in expr into Momentum[a] + Momentum[b] + ... .

See also:  ExpandScalarProduct, MomentumCombine.

Examples

MomentumExpand[Momentum[p + q]] // StandardForm

ScalarProduct[p + q, r]

% // StandardForm

MomentumExpand[ScalarProduct[p + q, r]]

% // StandardForm

MomentumExpand[ScalarProduct[p + q, r - p]]

% // StandardForm

Calc[%]