Bounds on Neutron- Mirror Neutron Mixing from Pulsar Timings and Gravitational Wave Detections

Abstract

The mass loss in putative neutron star to mixed neutron - mirror neutron star transition implies a significant change of orbital period. The precise constancy of the latter can restrict scenarios recently suggested where neutron to mirror neutron mixing occurring in neutron stars, transforms them into mixed stars helping explain the narrow mass distribution observed for pulsars in binary systems. The observation of a very old millisecond pulsar with a mass of 2 solar masses is an additional strong constraint on the above transition.We also note that the observed gravitational waves signals from neutron-neutron stars merger constrain the neutron to mirror neutron transitions inside neutron stars. These considerations exclude a large region in the ${\epsilon }^{\prime }$, $\delta m^{\prime }$ plane of the neutron-mirror neutron mixing and mass

18 pages; more examples of binary pulsars included; main conclusions unchanged

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• A possible shortcut for neutron-antineutron oscillation through mirror world
• Neutron Decay to a Non-Abelian Dark Sector
• Dark sectors in neutron-shining-through-a-wall and nuclear absorption signals
• Neutron-Mirror-Neutron Oscillation and Neutron Star Cooling
• Dark Matter Catalyzed Baryon Destruction
• Constraints on Neutron-Mirror-Neutron Oscillation from Neutron Star Cooling
• How Macroscopic Limits on Neutron Star Baryon Loss Yield Microscopic Limits on Non-Standard-Model Baryon Decay
• Probing Dark Sectors with Neutron Stars
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• Dineutron decay into sterile anti-neutrinos in neutron stars and its observable consequences
• Effects of Neutron-Antineutron Transitions in Neutron Stars
• Baryon number violation from confining New Physics
• Neutron-Mirror Neutron oscillations in Matter
• Astrophysical bounds on mirror dark matter derived from binary pulsars timing data