Speaker
Jacek Zejma
(Jagiellonian University)
Description
Data collected in the measurement of the neutron electric dipole moment (nEDM) were used to look for the ultralow-mass axionlike dark matter. Analysis of ratio of frequencies of spin-precession of ultracold neutrons and 199Hg atoms enabled us to estimate an axion-induced oscillating electric dipole moment of the neutron and an axion-wind spin-precession effect. Our null result sets the first laboratory constraints on the coupling of axion dark matter to gluons, which improve on astrophysical limits by up to 3 orders of magnitude, and also improves on previous laboratory constraints on the axion coupling to nucleons by up to a factor of 40.
