Limits on the neutron-antineutron oscillation time from the stability of nuclei

Abstract

We refute a recent claim by Nazaruk that the limits placed on the free--space neutron--antineutron oscillation time ${\tau }_{n\bar{n}}$ can be improved by many orders of magnitude with respect to the estimate ${\tau }_{n\bar{n}}>2(T_0/\Gamma {)}^{1/2}$, where $T_0$ is a measured limit on the annihilation lifetime of a nucleus and $\Gamma \sim 100$ MeV is a typical antineutron-nucleus annihilation width.

Comments: 4 pages, Latex, submitted to Physics Letters B