Dark Matter Spin-Spin Interaction through the Pseudo-Scalar Vacuum Field

Abstract

We suggest that the pseudo-scalar vacuum field (PSV) in the dark matter (DM) sector of the Universe may be as important as the electromagnetic vacuum field in the baryonic sector. In particular, the spin-spin interaction between the DM fermions, mediated by PSV, may represent the strongest interaction between the DM fermions due to the absence of the electric charge and the magnetic dipole moment. Based on this assumption, we consider the influence of the spin-spin interaction, mediated by PSV, on the spin precession of the DM fermions (e. g. neutralino). In the secular approximation, we obtain the exact expression describing the frequency of the precession and estimate the decoherence rate.

Typos corrected, accepted version

References in corpus (6)

• A History of Dark Matter
• Search for chargino-neutralino production using recursive jigsaw reconstruction in final states with two or three charged leptons in proton-proton collisions at $\sqrt{s}$=13 TeV with the ATLAS detector
• Novel constraints on fermionic dark matter from galactic observables I: The Milky Way
• Axion Detection with Precision Frequency Metrology
• The sign of the dipole-dipole potential by axion exchange
• How Heavy can Neutralino Dark Matter be?