Radiation from a $D$-dimensional collision of shock waves: proof of first order formula and angular factorisation at all orders

Flávio S. Coelho, Carlos Herdeiro, Marco O. P. Sampaio

In two previous papers we have computed the inelasticity $\epsilon$ in a head-on collision of two $D$-dimensional Aichelburg-Sexl shock waves, using perturbation theory to calculate the g…