FEYN CALC SYMBOL

FAD


is the FeynCalc external form of FeynAmpDenominator and denotes an inverse propagator. FAD[q, q-p, ...] is 1/(q^2 (q-p)^2 ...). FAD[{q1,m}, {q1-p,m}, q2, ...] is 1/( (q1^2 - m^2) ( (q1-p)^2 - m^2 ) q2^2 ... ). Translation into FeynCalc internal form is performed by FeynCalcInternal.

ExamplesExamplesopen allclose all

Basic Examples  (1)Basic Examples  (1)

In[1]:=
Click for copyable input
Out[1]=
In[2]:=
Click for copyable input
Out[2]=
In[3]:=
Click for copyable input
Out[3]//StandardForm=
In[4]:=
Click for copyable input
Out[4]//StandardForm=
In[5]:=
Click for copyable input
Out[5]//StandardForm=