Speaker
Petar Kevin Rados
(DESY)
Description
The Belle II detector was completed with the installation of a silicon vertex detector
that covers most of the solid angle around the interaction region. In 2019 Physics Run
before summer shutdown, 5.15 /fb of data were collected at a center of mass energy
corresponding to the mass of the Y(4S).
We present the measurement of the L1 and high-level trigger efficiencies at Belle II
using the τ-pair events. The 1x3, 3x3, 1x5 and 1x1 τ-pair decay modes are considered.
These measurements were performed using the e+e collision data recorded by Belle II
during the early Phase III of data taking.
