FeynCalc manual (development version)

SetTemporalComponent

SetTemporalComponent[p, val] sets the value of the temporal component of a 44-vector pp, TemporalPair[ExplicitLorentzIndex[0],TemporalMomentum[p]] to val.

See also

Overview, TC, TemporalPair, TemporalMomentum.

Examples

FCClearScalarProducts[] 
 
ClearAll[t] 
 
SetTemporalComponent[p, t] 
 
TC[p]

tt

TC[p + q] // ExpandScalarProduct

q0+tq^0+t

SP[p, q] // LorentzToCartesian

q0tpqq^0 t-\overline{p}\cdot \overline{q}