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Six particle amplitudes from scattering equations

Six-gluon amplitude: (1)   with (2)

Integral via Inversions

Let us compute the following integral (1)   Performing , this integral becomes (2)   Thus we have (3)

Fresnel integral

The Fresnel integrals read (1)   Consider the following integral (2)   From this we have (3)   which gives (4)   Equation (2) also gives (5)   We give an alternative derivation in the following. Let us start with … Continue reading

Integral by Euler’s Formula

We compute the following integral (1)   Performing a partial fraction expansion of the integrand (2)   Thus we have (3)   Let us see another integral (4)   Using Euler’s Formula (5)   we have (6)