On the "Field-Theoretical Approach" to the Neutron-Antineutron Oscillations in Nuclei

Abstract

It is argued that within the correct treatment of analytical properties of the transition amplitudes, in particular, the second order pole structure, characteristic for the $n-\bar{n}$ transition in nuclei, the "infrared divergences" discussed in some papers, do not appear. Explicit calculation with the help of diagram technique shows that the neutron-antineutron oscillations are strongly suppressed within a deuteron, as well as within arbitrary nucleus, in comparison with the oscillations in vacuum.

Comments: 12 pages, 3 figures; amendments made, some references added