Speaker
Description
The Belle II detector is currently being built in Tsukuba, Japan and
will record $e^+e^-$ collision events at a record-breaking instantaneous
luminosity of $8\cdot 10^{35} \ \mathrm{cm^{-2}s^{-1}}$ which is delivered
by the SuperKEKB collider. Such a large luminosity is required to significantly
improve the precision on measurements of $B$, $D$ and $\tau$ decays to probe
for signs of physics beyond the standard model.
Luminosity- and beam-size dependent background processes make up a large part of
the measured events and an early software-based trigger, which combines the
measurements of the individual sub-detectors, is required to filter the data and only store
events which are of interest to physics analyses.
Tracking, especially in the central drift chamber (CDC),
plays a major role here, as it can provide variables needed for a correct event
classification in a fast and reliable way. This talk will present the planned
High-Level-Trigger scheme for Belle II and especially the chosen tracking concepts
to reach the required speed and reliability as well as some results on
the runtime and the efficiency of the algorithm.
