FeynCalc manual (development version)

DiracSpinorNormalization

DiracSpinorNormalization is an option for SpinorChainEvaluate, DiracSimplify and other functions. It specifies the normalization of the spinor inner products uˉ(p)u(p)\bar{u}(p) u(p) and vˉ(p)v(p)\bar{v}(p) v(p). Following values are supported:

See also

Overview, DiracSimplify, SpinorChainEvaluate.

Examples

SpinorUBar[p, m] . SpinorU[p, m] 
 
DiracSimplify[%]

uˉ(p,m).u(p,m)\bar{u}(p,m).u(p,m)

2m2 m

SpinorUBar[p, m] . SpinorU[p, m] 
 
DiracSimplify[%, DiracSpinorNormalization -> "Rest"]

uˉ(p,m).u(p,m)\bar{u}(p,m).u(p,m)

11

SpinorUBar[p, m] . SpinorU[p, m] 
 
DiracSimplify[%, DiracSpinorNormalization -> "Nonrelativistic"]

uˉ(p,m).u(p,m)\bar{u}(p,m).u(p,m)

mp0\frac{m}{p^0}