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Gravitationally enhanced depolarization of ultracold neutrons in magnetic-field gradients

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posted on 2023-06-08, 14:09 authored by Philip Harris, J M Pendlebury, N E Devenish
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.

History

Publication status

  • Published

File Version

  • Published version

Journal

Physical Review D

ISSN

1550-7998

Publisher

American Physical Society

Issue

1

Volume

89

Page range

016010-1-016010-5

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2014-01-17

First Open Access (FOA) Date

2014-01-17

First Compliant Deposit (FCD) Date

2014-01-17

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