24-28 February 2020
Budker Institute of Nuclear Physics
Asia/Novosibirsk timezone

Belle-II Level-1 trigger

25 Feb 2020, 16:40
Contributed Oral Electronics, Trigger and Data Acquisition Electronics, Trigger and Data Acquisition


Yoshihito IWASAKI (KEK)


The Belle-II Level-1 trigger has been designed and constructed to select physics events of our interests for the Belle-II experiment at the asymmetric-energy electron-positron collider SuperKEKB. Our main physics target is a B-meson pair produced via Upsilon 4S, but also continuum event and a tau pair are important. To select those events with high efficiency, we use signals from the central drift chamber and the electromagnetic calorimeter. We describe our Level-1 trigger system and its performance during the operation of SuperKEKB in 2019.

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