See also: B0, C0, D0, PaVe.
By default any is expressed in terms of 's.
According to the rules of dimensional regularization is set to 0.
![[Graphics:Images/index_gr_1.gif]](Images/index_gr_1.gif){kind=small}
![[Graphics:Images/index_gr_2.gif]](Images/index_gr_2.gif)
![[Graphics:Images/index_gr_4.gif]](Images/index_gr_4.gif){kind=small}
is expressed in terms of ![[Graphics:Images/index_gr_5.gif]](Images/index_gr_5.gif){kind=small}
's.
![[Graphics:Images/index_gr_3.gif]](Images/index_gr_3.gif){kind=small}
![[Graphics:Images/index_gr_6.gif]](Images/index_gr_6.gif)
![[Graphics:Images/index_gr_7.gif]](Images/index_gr_7.gif){kind=small}
![[Graphics:Images/index_gr_8.gif]](Images/index_gr_8.gif)
![[Graphics:Images/index_gr_10.gif]](Images/index_gr_10.gif){kind=small}
is set to 0.
![[Graphics:Images/index_gr_9.gif]](Images/index_gr_9.gif){kind=small}
![[Graphics:Images/index_gr_11.gif]](Images/index_gr_11.gif)
![[Graphics:Images/index_gr_12.gif]](Images/index_gr_12.gif){kind=small}
![[Graphics:Images/index_gr_13.gif]](Images/index_gr_13.gif)
Amplitudes![[Graphics:Images/index_gr_14.gif]](Images/index_gr_14.gif){kind=small}