On the beta function of the tube of the light cone

We construct the beta function of the Hermitian symmetric space $\mathrm O(n,2)/\mathrm O(n)\times\mathrm O(2)$, or, equivalently, of the tube $(\operatorname{Re}z_0)^2> (\operatorname{Re}z_1)^2+\dots+(\operatorname{Re}z_n)^2$ in $\mathbb C^{n+1}$. Bibl. 11 titles.