Dimensions of a pencil kernel
(
)
) (
Field
, ,
,
, d d
p
D x y z
x y
x x y y z x y
Ψ
ρ
′ ′
′
=
⋅
− −
∫∫
Basic equation
Dimensional analysis
Hence, the dimension is:
“One over mass”
E
⇔