Determination of the Spin-Spin Coupling Constant in Hydrogen Deuteride HD and Estimates of the Manifestation of Axion-Like Particles

摘要

An experimental value of the spin-spin coupling constant in deuterated molecular hydrogen HD has been obtained, J (pd) = (43.112 +/- 0.005) Hz (300 K), while investigating two gaseous samples at pressures of 95 and 155 atm. The experimental result does not coincide with Jpd = (43.31 +/- 0.05) Hz that was calculated theoretically by Helkager et al. The observed discrepancy Delta J (pd) ae (0.20 +/- 0.05 Hz) may point to a manifestation of the involvement of light pseudo-scalar (axion-like) bosons with a mass m (a) ae 1 keV/c (2) in the spin-spin coupling of the HD proton and deuteron.