Progress on the Electromagnetic Calorimeter Trigger Simulation at the Belle II Experiment

I. S. Lee, S. H. Kim, C. H. Kim, H. E. Cho, Y. J. Kim, J. K. Ahn, E. J. Jang, S. K. Choi, Y. Iwasaki, A. Kuzmin, Y. Unno, B. G. Cheon

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

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Аннотация

The Belle II experiment at the High Energy Accelerator Research Organization (KEK) in Japan started gathering data in Phase II in April 2018 to unravel new physics beyond the standard model by precisely measuring charge conjugation parity symmetry (CP) violation and rare weak decays of heavy quarks and leptons. It was performed at the SuperKEKB electron-positron collider mainly running at the (4S) resonance energy with the goal to reach the maximum instantaneous luminosity of 8× 1035 cm-2 s-1. A new algorithm is needed to operate the Belle II calorimeter trigger system stably in the much higher luminosity and beam background environment of SuperKEKB compared with the KEKB collider. In order to develop an appropriate algorithm, a detailed simulation study of the Belle II calorimeter trigger system is crucial. In this article, we report the results of the simulation of the electromagnetic calorimeter (ECL) trigger using physics and beam background Monte Carlo (MC) events and compare them with the ECL trigger performance in the Phase II operation. The simulation package is developed with the Belle II Geant4-based analysis framework called Basf2.

Язык оригиналаанглийский
Номер статьи9061044
Страницы (с-по)2143-2147
Число страниц5
ЖурналIEEE Transactions on Nuclear Science
Том67
Номер выпуска9
DOI
СостояниеОпубликовано - сен 2020

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