A new limit on Lorentz- and CPT-violating neutron spin interactions

J. M. Brown, S. J. Smullin, T. W. Kornack, M. V. Romalis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

We performed a search for neutron spin coupling to a Lorentz- and CPT-violating background field using a magnetometer with overlapping ensembles of K and 3He atoms. The co-magnetometer is mounted on a rotary platform for frequent reversal of its orientation. We measure sidereal oscillations in the signal to search for an anomalous spin coupling of an extrasolar origin. We limit the magnitude of equatorial components of the background field interacting with the neutron spin to be |bn| < 3.7 × 10-33 GeV at the 68% confidence level, improving on the previous limit by a factor of 30. This measurement represents the highest energy resolution of any spin anisotropy experiment.

Original languageEnglish (US)
Title of host publicationProceedings of the 5th Meeting on CPT and Lorentz Symmetry, CPT 2010
Pages75-83
Number of pages9
StatePublished - Dec 1 2011
Event5th Meeting on CPT and Lorentz Symmetry, CPT 2010 - Bloomington, IN, United States
Duration: Jun 28 2010Jul 2 2010

Publication series

NameProceedings of the 5th Meeting on CPT and Lorentz Symmetry, CPT 2010

Other

Other5th Meeting on CPT and Lorentz Symmetry, CPT 2010
CountryUnited States
CityBloomington, IN
Period6/28/107/2/10

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics

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