Neutron diffraction constraint on spin-dependent short range interaction

The direct constraint on the parameters of short range pseudomagnetic interaction of free neutron with matter is obtained from the recent test experiment on a search for neutron EDM by crystal-diffraction method. It is shown that this constraint on a product of scalar to pseudo-scalar coupling constants $g_s g_p$ is better than that of any other method for the range $λ< 10^{-5}$cm.

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