AliceO2Group/O2Physics
Nov 2024 – Aug 2025
4 Months active
Languages Used
C++
Technical Skills
C++ DevelopmentParticle PhysicsPhysics ReconstructionData AnalysisHigh Energy PhysicsMachine Learning
Yunfan Liu
PROFILE
Yunfan Liu
Yunfan Liu contributed to the AliceO2Group/O2Physics repository by developing and refining analysis pipelines for heavy-flavor and particle reconstruction studies. Over four months, Yunfan implemented C++-based features such as D+ meson correlation analysis in femtodream and machine learning-driven selection for OmegacToOmegaPi decays, expanding data structures and integrating robust analytics workflows. He improved Monte Carlo matching, candidate creation logic, and decay-length calculations, directly enhancing reconstruction accuracy and analysis reliability. By addressing configurable type errors and stabilizing selection logic, Yunfan’s work increased maintainability and reproducibility, demonstrating depth in C++ development, data analysis, and high energy physics software engineering.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
6Total
Bugs
2
Commits
6
Features
4
Lines of code
1,595
Activity Months4
Your Network
429 people
Work History
August 2025
1 Commits • 1 Features
Aug 1, 2025August 2025: Delivered D+ meson correlation analysis support in femtodream for the O2Physics repository, enabling analysis of D+ meson correlations including the D+ -> pi K pi decay channel. Expanded data structures and processing to support calculation and analysis of D+ meson correlations for comprehensive particle interaction studies. No major bugs fixed this month. Overall impact: strengthened heavy-flavor analysis capabilities, improving research efficiency and collaboration between PWGCF and PWGHF. Technologies demonstrated: C++ code improvements, data-structure design, femtodream integration, and robust analytics workflows.
1 Commits • 1 Features
Aug 1, 2025August 2025: Delivered D+ meson correlation analysis support in femtodream for the O2Physics repository, enabling analysis of D+ meson correlations including the D+ -> pi K pi decay channel. Expanded data structures and processing to support calculation and analysis of D+ meson correlations for comprehensive particle interaction studies. No major bugs fixed this month. Overall impact: strengthened heavy-flavor analysis capabilities, improving research efficiency and collaboration between PWGCF and PWGHF. Technologies demonstrated: C++ code improvements, data-structure design, femtodream integration, and robust analytics workflows.
August 2025
March 2025
2 Commits • 2 Features
Mar 1, 2025In March 2025, PWGHF-related work in the O2Physics repository focused on enhancing reconstruction robustness and MC analysis for Omega_c decays. The changes introduced new data-tracking capabilities, refined candidate handling for multiple decay scenarios, and integrated analysis support through histograms. The updates improve data quality, analysis reliability, and overall physics reach, aligning with ongoing priorities to increase signal efficiency and reduce biases in decay reconstruction.
March 2025
2 Commits • 2 Features
Mar 1, 2025In March 2025, PWGHF-related work in the O2Physics repository focused on enhancing reconstruction robustness and MC analysis for Omega_c decays. The changes introduced new data-tracking capabilities, refined candidate handling for multiple decay scenarios, and integrated analysis support through histograms. The updates improve data quality, analysis reliability, and overall physics reach, aligning with ongoing priorities to increase signal efficiency and reduce biases in decay reconstruction.
February 2025
2 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for AliceO2Group/O2Physics focused on feature delivery and pipeline robustness in the PWGHF analysis chain. Delivered ML-driven analysis capabilities for the OmegacToOmegaPi decay channel, integrated new ML tasks, input feature definitions for ML models, and selection capabilities. Refactored and stabilized Omegac0 data processing by updating the Omegac0ToOmegapi workflow, adjusting process switches, and fixing configurable type errors in selection logic. Improving data structures and selection criteria to better analyze Omegac0 candidates, leading to more reliable analysis and maintainable code.
2 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for AliceO2Group/O2Physics focused on feature delivery and pipeline robustness in the PWGHF analysis chain. Delivered ML-driven analysis capabilities for the OmegacToOmegaPi decay channel, integrated new ML tasks, input feature definitions for ML models, and selection capabilities. Refactored and stabilized Omegac0 data processing by updating the Omegac0ToOmegapi workflow, adjusting process switches, and fixing configurable type errors in selection logic. Improving data structures and selection criteria to better analyze Omegac0 candidates, leading to more reliable analysis and maintainable code.
February 2025
November 2024
1 Commits
Nov 1, 2024Month: 2024-11. Focused on stabilizing and improving the accuracy of the O2Physics reconstruction pipeline, specifically for Omegac0 decay-length calculations. Delivered a targeted bug fix in KFParticle query handling that directly improved reconstruction accuracy and reliability for downstream analyses.
November 2024
1 Commits
Nov 1, 2024Month: 2024-11. Focused on stabilizing and improving the accuracy of the O2Physics reconstruction pipeline, specifically for Omegac0 decay-length calculations. Delivered a targeted bug fix in KFParticle query handling that directly improved reconstruction accuracy and reliability for downstream analyses.
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Quality Metrics
Correctness83.4%
Maintainability80.0%
Architecture81.6%
Performance65.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++
Technical Skills
C++ DevelopmentData AnalysisHigh Energy PhysicsMachine LearningMonte Carlo SimulationParticle PhysicsPhysics AnalysisPhysics ReconstructionSoftware Engineering
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