Reason for the large scale differences in the results for the neutron-antineutron oscillation problem

Details Reason for the large scale differences in the results for the neutron-antineutron oscillation problem Reason for the large scale differences in the results for the neutron-antineutron oscillation problem

1998-10-14

arxiv.org/abs/hep-ph/9810354v1

Phys.Rev.C58:1884,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 Latex pages

Scientific paper

10.1103/PhysRevC.58.1884

It is shown that there is a double counting in the standard model of $n\bar {n}$ mixing in the medium, resulting in full cancellation of leading terms. The direct calculation of $n\bar{n}$ transition followed by annihilation is performed. The lower limit for the free-space $n\bar{n}$ oscillation time is $\tau_{n\bar{n}} \sim T_{n\bar{n}}>10^{16}y$, where $T_{n\bar{n}}$ is the lifetime of neutron bound in a nucleus. This limit exceeds the previous one by 16 orders of magnitude.

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