Preliminary measurement of the D$\rm{_{s}^{+}}$ lifetime using $\sim$ 70 fb$^{-1}$ of data collected by the Belle II experiment.

We have measured the D$\rm{_{s}^{+}}$ lifetime by reconstructing the final state $\rm{\phi[\rightarrow K^{+}K^{-}] \pi^{+}}$. We have used $\rm{e^{+}e^{-}}$ collision data corresponding to an integrated luminosity of $~$70 fb$^{-1}$ collected by the Belle II experiment running at the SuperKEKB accelerator. This early measurement demonstrates the performance capabilities of the Belle II detector.