New Approach to Test a Neutron Electroneutrality by the Spin Interferometry Technique

New method to measure a neutron electric charge is described. The main idea is to use SESANS technique, which provides a spacial splitting of neutron onto two eigenstates with different projection of spin on magnetic field. After passing through working area with applied uniform electric field E these two eigenstates are coupled back. Therefore, the phase of interference pattern, i.e. azimuthal spin direction, is defined by phase difference of two neutron eigenstates accumulated in the working area. This phase will be determined by the nonzero neutron electric charge. Preliminary estimations demonstrate that using this technique can improve the current constrain on neutron electric charge at least on one order of magnitude.