Decoherence Calculation for Neutron-Antineutron Bilayer Mirror Reflection*

A sensitive search for free neutron-antineutron oscillations [1] could either discover a \delta B=2 interaction or constrain post-sphaeleron baryogenesis. Neutron mirror reflection from a uniform medium can preserve the oscillations [2]. Using a recent theory [3] for antineutron-nucleus scattering lengths along with a Lindblad-based formalism [4], we present an estimation of decoherence effect in bilayer mirror reflection for neutron-antineutron two state systems.

[1] D. G. Phillips II, W. M. Snow, et al., Phys. Rep. 612 (2016) 1.

[2] V. V. Nesvizhevsky, et al., Phys. Rev. Lett. 122, 221802 (2019), V. Gudkov, Phys. Lett. B 808, 135636 (2020).

[3] K. V. Protasov, et al., Phys. Rev. D 102, 075025 (2020).

[4] B. O. Kerbikov, Phys. Lett. B 795 (2019) 362.