FeynCalc manual (development version)

Mandelstam

Mandelstam is an option for DiracTrace, OneLoop, OneLoopSum and TrickMandelstam. A typical setting is Mandelstam -> {s, t, u, m1^2+m2^2+m3^2+m4^2}, which implies $s + t + u = m_1^2+m_2^2+m_3^2+m_4^2$. If other than four-particle processes are calculated, the setting should be Mandelstam -> {}.

See also

Overview, DiracTrace, OneLoop, OneLoopSum, TrickMandelstam, SetMandelstam.

Examples