Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 72: Precision Tests of the Standard Model 2
HK 72.1: Gruppenbericht
Freitag, 27. März 2015, 14:30–15:00, P/H1
Testing Lorentz Invariance in Weak Decays — •Auke Sytema, Elwin Dijck, Steven Hoekstra, Klaus Jungmann, Stefan Müller, Jacob Noordmans, Gerco Onderwater, Coen Pijpker, Rob Timmermans, Keri Vos, Lorenz Willmann, and Hans Wilschut — Van Swinderen Institute, University of Groningen, The Netherlands
Lorentz invariance is the invariance of physical laws under orientations and boosts. It is a key assumption in Special Relativity and the Standard Model of Particle Physics. Several theories unifying General Relativity and Quantum Mechanics allow breaking of Lorentz invariance.
At the Van Swinderen Institute in Groningen a theoretical and experimental research program was started to study Lorentz invariance violation (LIV) in weak interactions. The theoretical work allowed a systematic approach to LIV in weak decays. Limits could be set on parameters that quantify LIV.
A novel beta decay experiment was designed which tests rotational invariance with respect to the orientation of nuclear spin. In particular, using the isotope 20Na, the decay rate dependence on the nuclear polarization direction was measured. Searching for sidereal variations, systematic errors can be suppressed. The result of the experiment will be presented.