scholarly journals Data quality monitors of vertex detectors at the start of the Belle II experiment

2020 ◽  
Vol 245 ◽  
pp. 01035
Author(s):  
Peter Kodyš ◽  
Jesus Abudinen ◽  
Karlheinz Georg Ackermann ◽  
Karol Mateusz Adamczyk ◽  
Patrick Ahlburg ◽  
...  
Keyword(s):  
Data Quality ◽  
Quality Monitoring ◽  
Software Framework ◽  
Phase 2 ◽  
Full Data ◽  
Vertex Detector ◽  
Belle Detector ◽  
Electron Positron ◽  
Belle Ii ◽  
Positron Collisions

The Belle II experiment features a substantial upgrade of the Belle detector and will operate at the SuperKEKB energy-asymmetric e+e− collider at KEK in Tsukuba, Japan. The accelerator completed its first phase of commissioning in 2016, and the Belle II detector saw its first electron-positron collisions in April 2018. Belle II features a newly designed silicon vertex detector based on double-sided strip layers and DEPFET pixel layers. A subset of the vertex detector was operated in 2018 to determine background conditions (Phase 2 operation). The collaboration completed full detector installation in January 2019, and the experiment started full data taking. This paper will report on the final arrangement of the silicon vertex detector part of Belle II with a focus on online monitoring of detector conditions and data quality, on the design and use of diagnostic and reference plots, and on integration with the software framework of Belle II. Data quality monitoring plots will be discussed with a focus on simulation and acquired cosmic and collision data.

scholarly journals The Online DQM of BESIII

2019 ◽  
Vol 214 ◽  
pp. 01027
Author(s):  
Xiaobin Ji ◽  
Yanjia Xiao ◽  
Jiada Lu ◽  
Fei Li
Keyword(s):  
Data Quality ◽  
General Purpose ◽  
Quality Monitoring ◽  
Software Environment ◽  
Online Data ◽  
Electron Positron ◽  
Reconstruction Software ◽  
Main Components ◽  
Positron Collisions ◽  
Beijing China

The BESIII is a general-purpose experiment for studying electron-positron collisions at BEPCII which is located at IHEP, Beijing, China. It works in the τ-charm region mainly. Several world’s largest samples in this region had been collected. The BESIII DQM is a lightweight online data quality monitoring (DQM) solution at BESIII. It uses the full offline reconstruction software to reconstruct a part of data for real-time monitoring the data quality. The document gives an overview of the BESIII DQM system, including the framework, main components and data flow. The DQM system separates online DAQ and offline software environment as much as possible and is easy to expand.

scholarly journals Prospects for $\tau$ lepton physics at Belle II

2019 ◽  
Author(s):  
Michel Enrique Hernandez Villanueva
Keyword(s):  
Precision Measurements ◽  
Model Parameters ◽  
Lepton Production ◽  
Lepton Flavor ◽  
Belle Detector ◽  
Physics Program ◽  
Electron Positron ◽  
Belle Ii ◽  
Positron Collisions ◽  
Broad Program

The Belle II experiment is an upgrade of the Belle detector and will operate at the SuperKEKB energy-asymmetric e^+e^-e+e− collider. The accelerator has already successfully completed the first phase of commissioning and first electron positron-collisions in Belle II were observed in April 2018. The design luminosity of SuperKEKB is 8x10^{35}35 cm^{-2}−2s^{-1}−1 and the Belle II experiment aims to record 50 ab^{-1}−1 of data. Belle II has a broad program of \tauτ physics, in particular, precision measurements of Standard Model parameters and searches of lepton flavor and lepton number violations, benefiting from the large cross-section of the pairwise \tauτ lepton production in e^+e^-e+e− collisions. In this talk, we will review the \tauτ lepton physics program of Belle II.

A data quality monitoring software framework for the BESIII experiment

2012 ◽  
Vol 36 (1) ◽  
pp. 62-66 ◽  
Author(s):  
Ji-Feng Hu ◽  
Yang-Heng Zheng ◽  
Xiao-Dong Sun ◽  
Xiao-Bin Ji
Keyword(s):  
Data Quality ◽  
Quality Monitoring ◽  
Software Framework ◽  
Monitoring Software

The slow control and data quality monitoring systems for the Belle II experiment

2014 ◽  
Author(s):  
Tomoyuki Konno ◽  
Ryosuke Itoh ◽  
Mikihiko Nakao ◽  
Soh Y. Suzuki ◽  
Satoru Yamada
Keyword(s):  
Data Quality ◽  
Quality Monitoring ◽  
Monitoring Systems ◽  
Belle Ii

scholarly journals Alignment and Calibration of the Belle II Detector

2019 ◽  
Vol 214 ◽  
pp. 01040
Author(s):  
Tadeáၡ Bilka ◽  
Kirill Chilikin ◽  
David Dossett ◽  
Yinghui Guan ◽  
Jakub Kandra ◽  
...  
Keyword(s):  
Drift Chamber ◽  
High Energy ◽  
Beyond The Standard Model ◽  
Vertex Detector ◽  
Alignment Procedure ◽  
Processing Power ◽  
Electron Positron ◽  
The Standard Model ◽  
Belle Ii

In spring 2018 the SuperKEKB electron-positron collider at High Energy Accelerator Research Organization (KEK, Tsukuba, Japan) will deliver its first collisions to the Belle II experiment. The aim of Belle II is to collect a data sample 50 times larger than the previous generation of BFactories taking advantage of the unprecedented SuperKEKB design luminosity of 8×1035cm-2s-1. The Belle II detector will allow to conduct precise measurements in the harsh collider environment, probing for signs of physics beyond the standard model at the precision frontier. In order to deliver data suitable for physics analysis, the detector has to be properly calibrated on a regular basis. Among other calibrations the detector alignment plays a key role. For example, precise measurements of time dependent CP-violation rely on the accurate alignment of the new vertex detector, as well as on the determination of the beamspot position and size. To automate the calibration procedures and manage the large amount of data and processing power needed for detector calibration, a software framework has been developed which allows to define the complete workflow and to execute it on a computing cluster. The framework integrates the Millepede II algorithm to solve the large minimization problem emerging in the track-based alignment and calibration of the pixel and strip detector, the central drift chamber, and the muon system. The first collision data will allow to test and to further improve and tune the alignment and calibration procedures. Although the vertexing capabilities will be limited due to the installation of only a small slice of the full vertex detector, the commissioning phase will allow to test most of the alignment procedure features and to prepare for the full operation. We will present the results achieved during the first data taking, the experience gained and the plans for the first physics run with the full detector.

scholarly journals The Belle II Experiment: Status and Prospects

Universe ◽  
2018 ◽  
Vol 4 (10) ◽  
pp. 101 ◽  
Author(s):  
Paolo Branchini
Keyword(s):  
Large Dataset ◽  
Detector Performance ◽  
Belle Detector ◽  
Belle Ii ◽  
Belle Experiment ◽  
Positron Collisions

The Belle II experiment is a substantial upgrade of the Belle detector and will operate at the SuperKEKBenergy-asymmetric e + e − collider. The accelerator has already successfully completed the first phase of commissioning in 2016. The first electron versus positron collisions in Belle II were delivered in April 2018. The design luminosity of SuperKEKB is 8 × 10 35 cm−2s−1, and the Belle II experiment aims to record 50 ab−1 of data, a factor of 50 more than the Belle experiment. This large dataset will be accumulated with low backgrounds and high trigger efficiencies in a clean e + e − environment. This contribution will review the detector upgrade, the achieved detector performance and the plans for the commissioning of Belle II.

The Slow Control and Data Quality Monitoring System for the Belle II Experiment

2015 ◽  
Vol 62 (3) ◽  
pp. 897-902 ◽  
Author(s):  
Tomoyuki Konno ◽  
Ryosuke Itoh ◽  
Mikihiko Nakao ◽  
Soh Y. Suzuki ◽  
Satoru Yamada
Keyword(s):  
Data Quality ◽  
Monitoring System ◽  
Quality Monitoring ◽  
Belle Ii

scholarly journals A software framework for Data Quality Monitoring in ATLAS

2008 ◽  
Vol 119 (2) ◽  
pp. 022033 ◽  
Author(s):  
S Kolos ◽  
A Corso-Radu ◽  
H Hadavand ◽  
M Hauschild ◽  
R Kehoe
Keyword(s):  
Data Quality ◽  
Quality Monitoring ◽  
Software Framework

scholarly journals Alignment for the first precision measurements at Belle II

2020 ◽  
Vol 245 ◽  
pp. 02023
Author(s):  
Tadeas Bilka ◽  
Jesus Abudinen ◽  
Karlheinz Georg Ackermann ◽  
Karol Mateusz Adamczyk ◽  
Patrick Ahlburg ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Cosmic Ray ◽  
Drift Chamber ◽  
Precision Measurements ◽  
Software Framework ◽  
Alignment Method ◽  
Vertex Detector ◽  
Detector Calibration ◽  
Target Performance ◽  
Belle Ii

On March 25th 2019, the Belle II detector recorded the first collisions delivered by the SuperKEKB accelerator. This marked the beginning of the physics run with vertex detector. The vertex detector was aligned initially with cosmic ray tracks without magnetic field simultaneously with the drift chamber. The alignment method is based on Millepede II and the General Broken Lines track model and includes also the muon system or primary vertex position alignment. To control weak modes, we employ sensitive validation tools and various track samples can be used as alignment input, from straight cosmic tracks to mass-constrained decays. With increasing luminosity and experience, the alignment is approaching the target performance, crucial for the first physics analyses in the era of Super-BFactories. We will present the software framework for the detector calibration and alignment, the results from the first physics run and the prospects in view of the experience with the first data.

scholarly journals The Software Framework of the Belle II Silicon Vertex Detector and its Development for the 2016 Test-Beam at DESY

2017 ◽  
Author(s):  
Giacomo Caria ◽  
K. Adamczyk ◽  
H. Aihara ◽  
C. Angelini ◽  
T. Aziz ◽  
...  
Keyword(s):  
Software Framework ◽  
Test Beam ◽  
Vertex Detector ◽  
Belle Ii
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