Trigger efficiency measurement using e+e- → τ+τ- events at Belle II

Sumitted to PubDB: 2020-08-04

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Authors	Petar Rados
Date	2020-07-28
Belle II Number	BELLE2-TALK-CONF-2020-053
Abstract	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.
Conference	40th International Conference on High Energy Physics