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MTV/MTV-G Experiment at TRIUMF Search of T-Violation and Gravity Signal at Nuclear Scale

Authors :
K. Ninomiya
Y. Nakaya
J. Onishi
Phil Levy
John A. Behr
Hidetada Baba
R. Tanuma
Mathew Pearson
Reiya Narikawa
Saki Tanaka
J. Murata
Hirokazu Kawamura
Shuntaro Saiba
Y. Totsuka
T. Iguri
R. Openshaw
Source :
Proceedings of the 12th Asia Pacific Physics Conference (APPC12).
Publication Year :
2014
Publisher :
Journal of the Physical Society of Japan, 2014.

Abstract

The MTV-G (MTV-Gravity) experiment is aiming to detect a strong gravitational field at around nuclear scale, utilizing an electron polarimeter of the MTV (Mott Polarimetry for T-Violation) experiment [1], which is searching a large T-Violating electron transverse polarization emitted in polarized Li-8 beta decay. The MTV experiment is running at TRIUMF-ISAC since 2009, yielding the highest precision test of T-Violation. The extreme sensitivity of the MTV polarimeter gives us an opportunity to perform a new type of gravity experiment. A modification of gravitational inverse square law at a microscopic scale is predicted by a large extra-dimension model in order to explain the hierarchy problem. The strong gravitational field can be detected as a large spin precession of electrons scattered from nuclei, caused by the “Geodetic precession” as a result of a warped space-time around the nuclear mass. In this experiment, longitudinal polarization of electrons emitted from a 90 Sr source is transferred into a transverse polarization via electromagnetic Thomas precession and possibly via the Geodetic precession.

Details

Database :
OpenAIRE
Journal :
Proceedings of the 12th Asia Pacific Physics Conference (APPC12)
Accession number :
edsair.doi...........866edf3cf12accc011dffe30a39eae24