Speaker
Jing Shu
(ITP-CAS)
Description
We derive the generalized partial wave expansion for N → M scattering amplitude in terms of spinor helicity variables. The basis amplitudes of the expansion with definite angular momentum j consist of the Poincar ́e Clebsch-Gordan coefficients. Moreover, we obtain a series of selection rules that restrict the anomalous dimension matrix of effective operators and the way how effective operators contribute to some 2 → N amplitudes at the loop level.
Author
Jing Shu
(ITP-CAS)
