A type of unifying relation in (A)dS spacetime

Abstract

Unifying relations of amplitudes are elegant results in flat spacetime, but the research on these in (A)dS case is not very rich. In this paper, we discuss a type of unifying relation in (A)dS by using Berends-Giele currents. By taking the flat limit, we also get a semi-on-shell way to prove the unifying relations in the flat case. We also discuss the applications of our results in cosmology.

Celestial Berends-Giele current

“…In other words, the origin of the BG recursion can be regarded as Feynman rules, which means this recursion is very convenient to be generalized to other cases. In recent years, there have been some new developments in the study of BG currents [10][11][12][13][14][15][16][17].…”