Universality of low-energy scattering in (2+1) dimensions

Khosrow Chadan, N. N. Khuri, Andre Martin +1

We prove that, in (2+1) dimensions, the S-wave phase shift, ${\delta }_0(k)$, k being the c.m. momentum, vanishes as either ${\delta }_0\to \frac{c}{\ln (k/m)}or{\delta }_0\to O(k^2)$ as $k\to 0$. The…