In order to detect the new physics effect with heavy quark and lepton weak decays, the Belle II experiment held at the SuperKEKB in KEK(Japan) started Phase II, the second stage of the experiment, purpose of which are first beam collision test, sub-detector calbribration with beam and first physics data taking [1]. Belle II detector status have to be monitored for stable operation during trigger and DAQ operation upon beam collision. Slow control system, is one of main monitoring and controlling framworks of Belle II experiment, is based on NSM2(Network Shared Memory II) which is advanced version of NSM used at the Belle experiment. The technique let for all systems connected to Belle II server share data by memory sharing via network [2]. The ECL Trigger slow control system is the slow control system for Electomagnetic Calorimeter Trigger system. This system consists of 3 parts which are the user module, the configuration database and the archiver.In this study, we report the development of slow control system for the Belle II electromagnetic calorimeter (ECL) trigger system during ongoing Phase II.

The Belle II experiment at KEK in Japan started beam collision from early of 2018 to probe a New Physics beyond the Standard Model by measuring CP violation phenomena and rare decays of beauty, charm quark and tau lepton. The experiment is performed at the SuperKEKB e+e-collider with 80 × 10 34 cm −2 s −1 as an ultimate instantaneous luminosity. As a severe beam background environment is highly anticipated, a detail simulation study of the Belle II calorimeter trigger system is very crucial to operate Belle II Trigger/DAQ system stably. We report simulation results on various trigger logic and efficiencies using physics and beam background events upon the Belle II Geant4-based analysis framework called Basf2.

We describe the offline data analysis module of Electromagnetic Calorimeter (ECL) trigger in the Belle II experiment. The Belle II experiment at SuperKEKB electron-positron collider in Japan aims to produce 50 ab −1 of integrated luminosity. The primary physics motivation is to search for the new physics from heavy quark/lepton flavor decays and dark matter search. To check the ECL trigger performance, we built an offline data monitoring module, Quality Assurance Monitoring (QAM) module. The ECL trigger QAM module is based on the Belle II Aanalysis Framework (basf2). It mainly analyzes the total energy and the cluster energy of Bhabha data skimmed by the Belle II data production group.