AliceO2Group/O2Physics
Nov 2024 – May 2026
12 Months active
Languages Used
C++CMake
Technical Skills
C++CMakeData AnalysisData ProcessingEvent Plane ReconstructionHigh Energy Physics
Zhengqing Wang
PROFILE
Zhengqing Wang
Over the past year, contributed to the AliceO2Group/O2Physics repository by developing and refining advanced particle identification, event reconstruction, and data analysis features for high energy physics workflows. Leveraging C++ and CMake, implemented configurable PID pipelines, integrated multi-detector analyses, and enhanced event shape engineering with new data structures and QA instrumentation. Extended the data model to support hypernuclei and event loss studies, introducing targeted selection criteria and histogram-based analytics to improve analysis fidelity and reproducibility. Focused on maintainable, configuration-driven code, the work enabled more granular physics measurements, streamlined downstream analytics, and strengthened the reliability of collaborative scientific computing efforts.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
19Total
Bugs
0
Commits
19
Features
14
Lines of code
11,721
Activity Months12
Your Network
493 peopleSame Organization
@cern.ch348
Work History
May 2026
1 Commits • 1 Features
May 1, 20262026-05 Monthly Summary for AliceO2Group/O2Physics: Delivered Advanced Event and Signal Loss Analysis feature, introducing new histograms for reconstructed events and refined data structures to improve data correlation and analysis accuracy. This enhancement strengthens event-loss measurement precision, enabling more reliable physics conclusions and smoother downstream analytics. No major bugs fixed this period; minor stabilization activities completed to support the feature. Technologies demonstrated include C++ data-structure optimization, histogram-based analytics, and PWGLF integration. Collaboration with Qing on the commit listed below.
1 Commits • 1 Features
May 1, 20262026-05 Monthly Summary for AliceO2Group/O2Physics: Delivered Advanced Event and Signal Loss Analysis feature, introducing new histograms for reconstructed events and refined data structures to improve data correlation and analysis accuracy. This enhancement strengthens event-loss measurement precision, enabling more reliable physics conclusions and smoother downstream analytics. No major bugs fixed this period; minor stabilization activities completed to support the feature. Technologies demonstrated include C++ data-structure optimization, histogram-based analytics, and PWGLF integration. Collaboration with Qing on the commit listed below.
May 2026
March 2026
1 Commits • 1 Features
Mar 1, 2026March 2026: Delivered a targeted enhancement to hypernuclei analysis in O2Physics by implementing NTPCCrossedRows selection criteria for He and Pi daughters. This improvement strengthens the data model and reconstruction task, enabling more accurate event selection and more reliable physics results. The change aligns with ongoing goals to improve analysis fidelity and maintainability of the O2Physics framework.
March 2026
1 Commits • 1 Features
Mar 1, 2026March 2026: Delivered a targeted enhancement to hypernuclei analysis in O2Physics by implementing NTPCCrossedRows selection criteria for He and Pi daughters. This improvement strengthens the data model and reconstruction task, enabling more accurate event selection and more reliable physics results. The change aligns with ongoing goals to improve analysis fidelity and maintainability of the O2Physics framework.
October 2025
1 Commits • 1 Features
Oct 1, 2025Month: 2025-10 — AliceO2Group/O2Physics Key features delivered: - FT0C q2 Data Processing and QA Integration: Adds processing and storage of FT0C q2 information to enable detailed analysis of event plane properties. Expands data structures and histograms and integrates FT0C q2 measurements into the existing event selection and QA workflow. Major bugs fixed: - None reported this month. Overall impact and accomplishments: - Enables deeper physics analysis of event plane properties, improves QA coverage, and tightens end-to-end data processing for FT0C q2 measurements. This work strengthens data quality and accelerates downstream analyses for FT0C-related studies. Technologies/skills demonstrated: - Data processing pipelines, data model extension, histogram construction/analysis, QA workflow integration, and contribution to collaborative physics software (C++/ROOT-like environment).
1 Commits • 1 Features
Oct 1, 2025Month: 2025-10 — AliceO2Group/O2Physics Key features delivered: - FT0C q2 Data Processing and QA Integration: Adds processing and storage of FT0C q2 information to enable detailed analysis of event plane properties. Expands data structures and histograms and integrates FT0C q2 measurements into the existing event selection and QA workflow. Major bugs fixed: - None reported this month. Overall impact and accomplishments: - Enables deeper physics analysis of event plane properties, improves QA coverage, and tightens end-to-end data processing for FT0C q2 measurements. This work strengthens data quality and accelerates downstream analyses for FT0C-related studies. Technologies/skills demonstrated: - Data processing pipelines, data model extension, histogram construction/analysis, QA workflow integration, and contribution to collaborative physics software (C++/ROOT-like environment).
October 2025
August 2025
1 Commits • 1 Features
Aug 1, 2025August 2025 monthly summary for AliceO2Group/O2Physics: Delivered a targeted enhancement to PWGLF by adding ITSChi2 information for daughter tracks (Helium and Pion) to hypernuclei analysis. This data-model extension provides richer track-level metrics, enabling more precise candidate selection and downstream analyses, improving analysis fidelity and decision speed for hypernuclei studies. Implemented in a focused change set aligned with PWGLF data-model evolution.
August 2025
1 Commits • 1 Features
Aug 1, 2025August 2025 monthly summary for AliceO2Group/O2Physics: Delivered a targeted enhancement to PWGLF by adding ITSChi2 information for daughter tracks (Helium and Pion) to hypernuclei analysis. This data-model extension provides richer track-level metrics, enabling more precise candidate selection and downstream analyses, improving analysis fidelity and decision speed for hypernuclei studies. Implemented in a focused change set aligned with PWGLF data-model evolution.
July 2025
1 Commits • 1 Features
Jul 1, 2025July 2025 — AliceO2Group/O2Physics: Delivered feature enhancements for ESERef particle selection and v2 analysis. Expanded particle range to include pions and kaons; refined selection criteria; updated preselection parameters; improved plotting and analysis capabilities for v2 calculations. These enhancements enable more accurate flow measurements and broaden the physics reach of O2Physics.
1 Commits • 1 Features
Jul 1, 2025July 2025 — AliceO2Group/O2Physics: Delivered feature enhancements for ESERef particle selection and v2 analysis. Expanded particle range to include pions and kaons; refined selection criteria; updated preselection parameters; improved plotting and analysis capabilities for v2 calculations. These enhancements enable more accurate flow measurements and broaden the physics reach of O2Physics.
July 2025
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 focused on delivering key enhancements to Event Shape Engineering (ESE) within PWGCF for AliceO2Group/O2Physics. Delivered a refactor of the ESE task with a new ESEtable data structure and expanded parameter set, alongside updated configurations for PID, event selection, and plotting to support deeper event-shape analyses. Added preselection cuts for light nuclei and broadened configurable PID/Ncls/Chi2/DCA parameters to improve particle identification. These changes enhance analysis flexibility, reproducibility, and scientific value for PWGCF studies.
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 focused on delivering key enhancements to Event Shape Engineering (ESE) within PWGCF for AliceO2Group/O2Physics. Delivered a refactor of the ESE task with a new ESEtable data structure and expanded parameter set, alongside updated configurations for PID, event selection, and plotting to support deeper event-shape analyses. Added preselection cuts for light nuclei and broadened configurable PID/Ncls/Chi2/DCA parameters to improve particle identification. These changes enhance analysis flexibility, reproducibility, and scientific value for PWGCF studies.
April 2025
1 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for AliceO2Group/O2Physics focusing on feature delivery, build/integration work, and overall impact. The major activity was delivering the P He3 flow correlation analysis feature, integrated with the existing pidcme codebase, accompanied by build system updates and targeted refactoring to enable enhanced particle identification and flow analysis capabilities.
1 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for AliceO2Group/O2Physics focusing on feature delivery, build/integration work, and overall impact. The major activity was delivering the P He3 flow correlation analysis feature, integrated with the existing pidcme codebase, accompanied by build system updates and targeted refactoring to enable enhanced particle identification and flow analysis capabilities.
April 2025
March 2025
3 Commits • 1 Features
Mar 1, 2025March 2025 performance summary for AliceO2Group/O2Physics: Delivered a major Particle Identification (PID) enhancement for CME signal processing, consolidating and expanding the PID pipeline across TOF/ITS analyses, DCA-based cuts, and momentum-dependent method selection. Introduced new DCA axes (DCAz, DCAxy) and expanded QA/plotting to enable granular performance tracking across momentum ranges and centrality bins. Implemented improved track quality handling and flexible integration of PID methods by momentum, strengthening robustness of CME signal extraction and reducing potential systematics. Key QA/validation improvements included updates to CME signal and TOF QA, PID selection logic, and systematic checks, supported by targeted commits. These changes increased analysis reliability, traceability, and business value by enabling more precise and reproducible CME measurements, faster validation cycles, and a scalable PID framework for future analyses.
March 2025
3 Commits • 1 Features
Mar 1, 2025March 2025 performance summary for AliceO2Group/O2Physics: Delivered a major Particle Identification (PID) enhancement for CME signal processing, consolidating and expanding the PID pipeline across TOF/ITS analyses, DCA-based cuts, and momentum-dependent method selection. Introduced new DCA axes (DCAz, DCAxy) and expanded QA/plotting to enable granular performance tracking across momentum ranges and centrality bins. Implemented improved track quality handling and flexible integration of PID methods by momentum, strengthening robustness of CME signal extraction and reducing potential systematics. Key QA/validation improvements included updates to CME signal and TOF QA, PID selection logic, and systematic checks, supported by targeted commits. These changes increased analysis reliability, traceability, and business value by enabling more precise and reproducible CME measurements, faster validation cycles, and a scalable PID framework for future analyses.
February 2025
3 Commits • 2 Features
Feb 1, 2025February 2025 (AliceO2Group/O2Physics): Delivered two major PID enhancements and quality-assurance improvements to strengthen detector cross-talk handling and data reliability. Implemented ITS-TPC-TOF integrated PID with refined event selection, multi-detector n-sigma PID, cluster-size information, and detailed QA plots, including CCDB-based purity cuts to improve pion/kaon/proton identification. Introduced a dedicated TOF-only PID mode with new configuration options and updated QA visuals. A bug fix was included to add checks for removing ITS-TPC contaminations, reducing mis-identification and improving PID purity. These changes enhance physics analysis accuracy, reduce downstream rework, and bolster data-quality workflows.
3 Commits • 2 Features
Feb 1, 2025February 2025 (AliceO2Group/O2Physics): Delivered two major PID enhancements and quality-assurance improvements to strengthen detector cross-talk handling and data reliability. Implemented ITS-TPC-TOF integrated PID with refined event selection, multi-detector n-sigma PID, cluster-size information, and detailed QA plots, including CCDB-based purity cuts to improve pion/kaon/proton identification. Introduced a dedicated TOF-only PID mode with new configuration options and updated QA visuals. A bug fix was included to add checks for removing ITS-TPC contaminations, reducing mis-identification and improving PID purity. These changes enhance physics analysis accuracy, reduce downstream rework, and bolster data-quality workflows.
February 2025
January 2025
2 Commits • 2 Features
Jan 1, 2025Concise monthly summary for 2025-01 highlighting feature delivery, QA enhancements, and analysis capabilities for the AliceO2Group/O2Physics repository. Focused on PID feature refinements and cross-check instrumentation to strengthen physics results and data quality.
January 2025
2 Commits • 2 Features
Jan 1, 2025Concise monthly summary for 2025-01 highlighting feature delivery, QA enhancements, and analysis capabilities for the AliceO2Group/O2Physics repository. Focused on PID feature refinements and cross-check instrumentation to strengthen physics results and data quality.
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for O2Physics: Delivered a self-correlation analysis feature for PID in PWGCF, refactored code for readability, and added histograms to visualize gamma-gamma and delta particle pair correlations, enabling deeper insight into particle interactions and improving analysis reproducibility.
1 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for O2Physics: Delivered a self-correlation analysis feature for PID in PWGCF, refactored code for readability, and added histograms to visualize gamma-gamma and delta particle pair correlations, enabling deeper insight into particle interactions and improving analysis reproducibility.
December 2024
November 2024
2 Commits • 1 Features
Nov 1, 2024November 2024: Delivered cross-framework PID analysis task integration in O2Physics across PWGCF and CME, consolidating PID capabilities into a dedicated analysis task. Implemented new build integration, a PID/CME task, and configuration options for PID cuts, detector analysis, and event plane calculations, plus QA/physics histograms. Refactored PID into a standalone task with histogramming and correlation function calculations. These changes enable unified PID workflows, improve QA visibility, and provide a solid foundation for downstream physics analyses.
November 2024
2 Commits • 1 Features
Nov 1, 2024November 2024: Delivered cross-framework PID analysis task integration in O2Physics across PWGCF and CME, consolidating PID capabilities into a dedicated analysis task. Implemented new build integration, a PID/CME task, and configuration options for PID cuts, detector analysis, and event plane calculations, plus QA/physics histograms. Refactored PID into a standalone task with histogramming and correlation function calculations. These changes enable unified PID workflows, improve QA visibility, and provide a solid foundation for downstream physics analyses.
Activity
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Quality Metrics
Correctness87.8%
Maintainability81.6%
Architecture83.2%
Performance71.0%
AI Usage21.0%
Skills & Technologies
Programming Languages
C++CMake
Technical Skills
Algorithm RefinementC++C++ DevelopmentCMakeConfiguration ManagementData AnalysisData ProcessingData StructuresEvent Plane ReconstructionEvent ReconstructionHigh Energy PhysicsParticle IdentificationParticle PhysicsPhysics AnalysisROOT
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