Pablo Vives Matasan

collaborators

2 papers

hep-th2025

The Magnus expansion in relativistic quantum field theory

Andreas Brandhuber, Graham R. Brown, Paolo Pichini +2

We investigate the Magnus expansion of the $N$ -operator in relativistic quantum field theory, which is related to the $S$ -matrix via $S = e^{i N}$ . We develop direct methods to comp…

hep-th2024

Spinning quadrupoles in effective field theories of gravity

Andreas Brandhuber, Graham R. Brown, Gabriele Travaglini +1

We study the effect of the two independent parity-even cubic interactions $I_{1} = R^{I^\pm I^^{2}}_{I^¼ I^½} R^{I^¼ I^½}_{I ¨ I ¨ } R^{I ¨ I ¨ }_{I^\pm I^^{2}}$ and $ G_3 = I_1 -2 {R^{Î¼Î½Î±}}_Î²{R^{Î²Î³}}…