@article{e92aeb47728d4629923ae7e7fd3ceff4,
title = "Search for Axionlike Dark Matter Using Solid-State Nuclear Magnetic Resonance",
abstract = "We report the results of an experimental search for ultralight axionlike dark matter in the mass range 162-166 neV. The detection scheme of our Cosmic Axion Spin Precession Experiment is based on a precision measurement of Pb207 solid-state nuclear magnetic resonance in a polarized ferroelectric crystal. Axionlike dark matter can exert an oscillating torque on Pb207 nuclear spins via the electric dipole moment coupling gd or via the gradient coupling gaNN. We calibrate the detector and characterize the excitation spectrum and relaxation parameters of the nuclear spin ensemble with pulsed magnetic resonance measurements in a 4.4 T magnetic field. We sweep the magnetic field near this value and search for axionlike dark matter with Compton frequency within a 1 MHz band centered at 39.65 MHz. Our measurements place the upper bounds |gd|<9.5×10-4 GeV-2 and |gaNN|<2.8×10-1 GeV-1 (95% confidence level) in this frequency range. The constraint on gd corresponds to an upper bound of 1.0×10-21 e cm on the amplitude of oscillations of the neutron electric dipole moment and 4.3×10-6 on the amplitude of oscillations of CP-violating θ parameter of quantum chromodynamics. Our results demonstrate the feasibility of using solid-state nuclear magnetic resonance to search for axionlike dark matter in the neV mass range.",
author = "Deniz Aybas and Janos Adam and Emmy Blumenthal and Gramolin, {Alexander V.} and Dorian Johnson and Annalies Kleyheeg and Samer Afach and Blanchard, {John W.} and Centers, {Gary P.} and Antoine Garcon and Martin Engler and Figueroa, {Nataniel L.} and Sendra, {Marina Gil} and Arne Wickenbrock and Matthew Lawson and Tao Wang and Teng Wu and Haosu Luo and Hamdi Mani and Philip Mauskopf and Graham, {Peter W.} and Surjeet Rajendran and Kimball, {Derek F.Jackson} and Dmitry Budker and Sushkov, {Alexander O.}",
note = "Funding Information: The authors thank Oyku Acican for her help with Fig. , and Alexander Wilzewski, Hendrik Bekker, O. P. Sushkov, and V. Flambaum for valuable contributions and discussions. The authors acknowledge support from U.S. Department of Energy Award No. DESC0019450, the Heising-Simons Foundation Grant No. 2015-039, the Simons Foundation Grant No. 641332, and the Alfred P. Sloan Foundation Grant No. FG-2016-6728. The work of the Mainz group was supported by the Cluster of Excellence funded by the German Research Foundation (DFG) within the German Excellence Strategy (Project ID 39083149), by the European Research Council (ERC) under the European Union Horizon 2020 Research and Innovation Program (project Dark-OST, Grant Agreement No. 695405), and by the DFG Reinhart Koselleck project. D. F. J. K. acknowledges the support of the National Science Foundation under Grant No. PHY-1707875. Publisher Copyright: {\textcopyright} 2021 authors.",
year = "2021",
month = apr,
day = "9",
doi = "10.1103/PhysRevLett.126.141802",
language = "English (US)",
volume = "126",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "14",
}