Test of Lorentz invariance in $\beta$ decay of polarized ${}^{20}\text{Na}$

A. Sytema, J. E. van den Berg, O. Böll +17

We search for a dependence of the lifetime of ${}^{20}\text{Na}$ nuclei on the nuclear spin direction. Such a directional dependence would be evidence for Lorentz-invariance violatio…