000002037 001__ 2037 000002037 005__ 20200728182443.0 000002037 037__ $$aBELLE2-NOTE-PL-2020-015 000002037 041__ $$aeng 000002037 100__ $$aThe Belle II Collaboration 000002037 245__ $$aL1 trigger efficiencies for e+e− -> tau+tau- events 000002037 260__ $$a$$c2020-07-24 000002037 300__ $$a11 000002037 520__ $$aThe Level 1 trigger efficiency has been studied in τ-pair events. The ee → ττ → 1×3 prong and 1×1 prong decay signatures are considered. These measurements were performed using the e+e− collision data recorded during the 2019a, 2019b and 2019c data taking periods. This document contains the approved plots and captions. 000002037 8560_ $$ftorben.ferber@desy.de 000002037 8564_ $$uhttps://docs.belle2.org/record/2037/files/BELLE2-NOTE-PL-2020-015.pdf