Development of an event time finding algorithm for multi-wire drift chamber-based Level-1 trigger system in the Belle II experiment

Eunil Won, Hyunki Moon

Research output: Contribution to journalArticlepeer-review

Abstract

The Belle II detector at the SuperKEKB e+e- collider in Japan is designed for precise measurements of weak interaction parameters and new physics beyond the Standard Model; therefore, it requires very high instantaneous luminosity. To handle such high luminosity, the level-1 trigger system in the Belle II experiment is designed to efficiently trigger events of interest with the highest efficiency. Among many sub-detectors, track reconstruction of charged particles is performed using information collected from the central drift chamber. Therefore, the central drift chamber-based trigger plays a central role in distinguishing specific types of physics based on fast track reconstruction. To improve the longitudinal position resolution of a track vertex and for the fine-tuning of trigger signal timing, the time of the collision, which we call event time, is necessary. We developed an event time finding algorithm using the wire hit time information obtained from the central drift chamber and validated our algorithm through Monte Carlo simulation.

Original languageEnglish
Pages (from-to)117-122
Number of pages6
JournalJournal of the Korean Physical Society
Volume80
Issue number2
DOIs
Publication statusPublished - 2022 Jan
Externally publishedYes

Keywords

  • Belle II experiment
  • Central drift chamber
  • Event time
  • Level-1 trigger

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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