2 problems

Let $p$ be the momentum of a massless mode and define the non-relativistic rapidity … For relativistic massless scattering, let $\theta$ denote the rapidity difference, and let rig…

Let $\mathbb{C}^2=\{z_1=z_2=z_3=0\}\subset\mathbb{C}^5$ and let $r=\sqrt{|z_1|^2+|z_2|^2+|z_3|^2}$ be the radius normal to $\mathbb{C}^2$. Let…