NEPAL

Abstract: In this note, we present the search for the lepton flavour violating \(\tau\to\ell\phi\) decays, where \( \ell=e,\mu\), using 189 fb-1 of data recorded by the Belle II experiment. The strategy is based on an inclusive selection, reconstructing only the tau signal decay, contrary to what was done previousle by Belle and Babar that used the so-called 3x1 topology.

Abstract: We discuss the theoretical methods, their implementations and the results of the measurement of the SVD Cluster Position resolution with data collected in 2020.

Abstract: This note presents a method to measure the fake tracks rate with Bhabha events. Results are shown for a subset of proc 11 data and MC13.

Abstract: This note presents a study aiming at defining the track selection for tau events. It is based on MC13b sample. Three IP cut combinations are identified allowing to reach a signal efficiency larger than 96% for a background rejection above 70%. Additional selections on other variables are also discussed.