 Scattering Equations and KLT Orthogonality by Freddy Cachazo and others

Original byline: Freddy Cachazo, Song He and Ellis Ye Yuan. Inspected section 2, equations 1–7, null external momenta and scattering equations; section 3, equations 8 and its projective gauge fixing. Section 6.2 relates the equations to high-energy string scattering.