Choose coordinate
frame for recoil polarization:
(P1,P2,P3)
(Px,Py,Pz) (Px',Py',Pz')
(Pt,Pn,Pl)
Choose polarization parameters for electron
(hel) and virtual photon (e):
hel
e
Choose
kinematical variables
choose an independent (running)
variable: Q² W QF
choose values for Q², W, Q,
F, step size and maximum value: