Gravitationally enhanced depolarization of ultracold neutrons in magnetic-field gradients

Harris, P G, Pendlebury, J M and Devenish, N E (2014) Gravitationally enhanced depolarization of ultracold neutrons in magnetic-field gradients. Physical Review D, 89 (1). 016010-1-016010-5. ISSN 1550-7998

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Abstract

Trapped ultracold neutrons (UCN) have for many years been the mainstay of experiments to search for the electric dipole moment (EDM) of the neutron, a critical parameter in constraining scenarios of new physics beyond the Standard Model. Because their energies are so low, UCN preferentially populate the lower region of their physical enclosure, and do not sample uniformly the ambient magnetic field throughout the storage volume. This leads to a substantial increase in the rate of depolarization, as well as to shifts in the measured frequency of the stored neutrons. Consequences for EDM measurements are discussed.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics > QC0770 Nuclear and particle physics. Atomic energy. Radioactivity > QC0793 Elementary particle physics
Depositing User: Philip Harris
Date Deposited: 17 Jan 2014 13:39
Last Modified: 07 Mar 2017 09:36
URI: http://sro.sussex.ac.uk/id/eprint/47383

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