First test of Lorentz invariance in the weak decay of polarized nuclei

S. E. Müller, E. A. Dijck, H. Bekker, J. E. van den Berg, O. Böll, S. Hoekstra, K. Jungmann, C. Meinema, J. P. Noordmans, M. Nunez Portela, C. J. G. Onderwater, C. Pijpker, A. P. P. van der Poel, B. Santra, A. Sytema, R. G. E. Timmermans, O. O. Versolato, L. Willmann, H. W. Wilschut*, K. Yai

*Corresponding author for this work

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Abstract

A new test of Lorentz invariance in the weak interactions has been made by searching for variations in the decay rate of spin-polarized Na-20 nuclei. This test is unique to Gamow-Teller transitions, as was shown in the framework of a recently developed theory that assumes a Lorentz symmetry breaking background field of tensor nature. The nuclear spins were polarized in the up and down direction, putting a limit on the amplitude of sidereal variations of the form vertical bar(Gamma(up) - Gamma(down))vertical bar/(Gamma(up) + Gamma(down)) <3 x 10(-3). This measurement shows a possible route toward a more detailed testing of Lorentz symmetry in weak interactions.

Original languageEnglish
Article number071901
Number of pages5
JournalPhysical Review D
Volume88
Issue number7
DOIs
Publication statusPublished - 15-Oct-2013

Keywords

  • ROTATIONAL INVARIANCE

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