New limit on Lorentz- and CPT-violating neutron spin interactions

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

doi:10.1103/PhysRevLett.105.151604

New limit on Lorentz- and CPT-violating neutron spin interactions

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

Research output: Contribution to journal › Article › peer-review

282 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 He3 atoms. The comagnetometer is mounted on a rotary platform for frequent reversal of its orientation. We measure sidereal oscillations in the signal to search for anomalous spin coupling of extra-solar origin. We determine the equatorial components of the background field interacting with the neutron spin to bxn=(0.1±1.6)×10^-33GeV and bxn=(2.5±1.6) ×10^-33GeV, improving on the previous limit by a factor of 30. This measurement represents the highest energy resolution of any spin anisotropy experiment.

Original language	English (US)
Article number	151604
Journal	Physical review letters
Volume	105
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.105.151604
State	Published - Oct 5 2010

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.105.151604

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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 He3 atoms. The comagnetometer is mounted on a rotary platform for frequent reversal of its orientation. We measure sidereal oscillations in the signal to search for anomalous spin coupling of extra-solar origin. We determine the equatorial components of the background field interacting with the neutron spin to bxn=(0.1±1.6)×10-33GeV and bxn=(2.5±1.6) ×10-33GeV, improving on the previous limit by a factor of 30. This measurement represents the highest energy resolution of any spin anisotropy experiment.",

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AU - Brown, J. M.

AU - Smullin, S. J.

AU - Kornack, T. W.

AU - Romalis, M. V.

PY - 2010/10/5

Y1 - 2010/10/5

N2 - 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 He3 atoms. The comagnetometer is mounted on a rotary platform for frequent reversal of its orientation. We measure sidereal oscillations in the signal to search for anomalous spin coupling of extra-solar origin. We determine the equatorial components of the background field interacting with the neutron spin to bxn=(0.1±1.6)×10-33GeV and bxn=(2.5±1.6) ×10-33GeV, improving on the previous limit by a factor of 30. This measurement represents the highest energy resolution of any spin anisotropy experiment.

AB - 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 He3 atoms. The comagnetometer is mounted on a rotary platform for frequent reversal of its orientation. We measure sidereal oscillations in the signal to search for anomalous spin coupling of extra-solar origin. We determine the equatorial components of the background field interacting with the neutron spin to bxn=(0.1±1.6)×10-33GeV and bxn=(2.5±1.6) ×10-33GeV, improving on the previous limit by a factor of 30. This measurement represents the highest energy resolution of any spin anisotropy experiment.

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JO - Physical review letters

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New limit on Lorentz- and CPT-violating neutron spin interactions

Abstract

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