Now showing items 1-3 of 3
CHY loop integrands from holomorphic forms
(Springer Verlag, 2017-03-01)
Recently, the Cachazo-He-Yuan (CHY) approach for calculating scattering amplitudes has been extended beyond tree level. In this paper, we introduce a way of constructing CHY integrands for Φ3 theory up to two loops from ...
One-loop Parke-Taylor factors for quadratic propagators from massless scattering equations
(Springer Verlag, 2017-10-01)
In this paper we reconsider the Cachazo-He-Yuan construction (CHY) of the so called scattering amplitudes at one-loop, in order to obtain quadratic propagators. In theories with colour ordering the key ingredient is the ...
Quadratic Feynman loop integrands from massless scattering equations
(American Physical Society, 2017-05-17)
Recently, the Cachazo-He-Yuan (CHY) approach has been extended to the loop level, but the resulting loop integrand has propagators that are linear in the loop momentum unlike Feynman’s. In this paper, we present a new ...