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2015

One-loop Scattering Equations and Amplitudes from Forward Limit

He, Song, Yuan, Ellis Ye

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We show that the forward limit of tree-level scattering equations with two massive particles yields the SL(2,C)-covariant form of the one-loop scattering equations recently proposed by Geyer et al.

We clarify several properties about these equations and the formulas at one loop.
We then argue that in the bi-adjoint scalar theory, such forward limit yields the correct one-loop massless amplitudes, which leads to a new formula for the latter.

One-loop Scattering Equations and Amplitudes from Forward Limit · Around

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