Nonoblique correction

In four-fermion scattering processes of particle physics, a nonoblique correction, also called a direct correction, refers to a radiative correction of type

e⁺
 + 
e⁻
 → 
q
 + 
q

in the electroweak sector of the Standard Model. These corrections are being studied at the CERN LEP collider. Together with the oblique corrections, nonoblique corrections can be used to constrain models of physics beyond the Standard Model.