TY - JOUR

T1 - Progress on the Electromagnetic Calorimeter Trigger Simulation at the Belle II Experiment

AU - Lee, I. S.

AU - Kim, S. H.

AU - Kim, C. H.

AU - Cho, H. E.

AU - Kim, Y. J.

AU - Ahn, J. K.

AU - Jang, E. J.

AU - Choi, S. K.

AU - Iwasaki, Y.

AU - Kuzmin, A.

AU - Unno, Y.

AU - Cheon, B. G.

N1 - Funding Information: Manuscript received February 26, 2019; revised May 9, 2019 and December 29, 2019; accepted April 3, 2020. Date of publication April 8, 2020; date of current version September 16, 2020. This work was supported in part by the Basic Science Research Program under Grant NRF-2018R1A2B3003643 and in part by the Foreign Large-size Research Facility Application Supporting Project through the National Research Foundation of Korea under Grant NRF-2019K1A3A7A09033857

PY - 2020/9

Y1 - 2020/9

N2 - 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.

AB - 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.

KW - Belle II

KW - electromagnetic calorimeter (ECL)

KW - simulation

KW - trigger

UR - http://www.scopus.com/inward/record.url?scp=85092323633&partnerID=8YFLogxK

U2 - 10.1109/TNS.2020.2986458

DO - 10.1109/TNS.2020.2986458

M3 - Article

AN - SCOPUS:85092323633

VL - 67

SP - 2143

EP - 2147

JO - IEEE Transactions on Nuclear Science

JF - IEEE Transactions on Nuclear Science

SN - 0018-9499

IS - 9

M1 - 9061044

ER -