FieldStrength
FieldStrength[mu, nu, a]
is the field strength tensor ∂μAνa−∂νAμa+gsAμbAνcfabc.
FieldStrength[mu, nu]
is the field strength tensor (∂μAν−∂νAμ).
The name of the field (A) and the coupling constant (g) can be set through the options or by additional arguments. The first two indices are interpreted as type LorentzIndex
, except OPEDelta
, which is converted to Momentum[OPEDelta]
.
See also
Overview
Examples
FieldStrength[\[Mu], \[Nu]]
Fμν
FieldStrength[\[Mu], \[Nu], a]
Fμνa
FieldStrength[\[Mu], \[Nu], Explicit -> True]
(∂μAν)−(∂νAμ)
FieldStrength[\[Mu], \[Nu], a, Explicit -> True]
gsfab19c20Aμb19.Aνc20+(∂μAνa)−(∂νAμa)
FieldStrength[\[Mu], \[Nu], a, CouplingConstant -> -SMP["g_s"], Explicit -> True]
−gsfab21c22Aμb21.Aνc22+(∂μAνa)−(∂νAμa)