AliceO2Group/O2Physics
Nov 2024 – Oct 2025
10 Months active
Languages Used
C++
Technical Skills
C++ DevelopmentPhysics AnalysisC++Particle PhysicsData AnalysisConfiguration Management
sashingo
PROFILE
Sashingo
Shingo Sakai developed advanced data analysis and event selection features for the AliceO2Group/O2Physics repository, focusing on electroweak boson and electron reconstruction in high energy physics. He engineered configurable isolation criteria, trigger-based event filtering, and Z boson–hadron correlation workflows using C++ and ROOT, integrating modular configuration management and histogramming. His work included enhancements to electron identification purity, mass reconstruction with KFParticle, and detailed QA instrumentation, addressing both physics analysis needs and software maintainability. By refining selection logic, extending diagnostic coverage, and improving workflow flexibility, Shingo delivered robust, reproducible analysis tools that support precise, differential studies in particle physics research.
Overall Statistics
Feature vs Bugs
92%Features
Repository Contributions
18Total
Bugs
1
Commits
18
Features
12
Lines of code
1,139
Activity Months10
Your Network
429 people
Work History
October 2025
1 Commits • 1 Features
Oct 1, 2025Monthly performance summary for 2025-10 focusing on business impact and technical achievements in the AliceO2Group/O2Physics repository. Key features delivered include enhancements to the Z->ee trigger study with a configurable momentum isolation axis, updated histogram definitions to reflect new configurations, and QA improvements by adding background event selections for Z->ee reconstruction. This work increases the precision and flexibility of trigger performance studies, enabling faster response to evolving analysis requirements. The changes are encapsulated in a single commit: 1667521e9476ffc483d54ebfbcb97248e2deb0d1 ("[PWGHF] Updated to Z->ee trig. study (#13165)"). Overall impact: improved configurability, traceability, and QA coverage, supporting more accurate physics results and more maintainable analysis workflows. Technologies demonstrated: C++/Python code changes in O2Physics, configuration management, histogramming, QA automation, and version control practices.
1 Commits • 1 Features
Oct 1, 2025Monthly performance summary for 2025-10 focusing on business impact and technical achievements in the AliceO2Group/O2Physics repository. Key features delivered include enhancements to the Z->ee trigger study with a configurable momentum isolation axis, updated histogram definitions to reflect new configurations, and QA improvements by adding background event selections for Z->ee reconstruction. This work increases the precision and flexibility of trigger performance studies, enabling faster response to evolving analysis requirements. The changes are encapsulated in a single commit: 1667521e9476ffc483d54ebfbcb97248e2deb0d1 ("[PWGHF] Updated to Z->ee trig. study (#13165)"). Overall impact: improved configurability, traceability, and QA coverage, supporting more accurate physics results and more maintainable analysis workflows. Technologies demonstrated: C++/Python code changes in O2Physics, configuration management, histogramming, QA automation, and version control practices.
October 2025
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025: Delivered feature enhancement in AliceO2Group/O2Physics that expands Z->ee QA histograms with configurable minimum Z mass and richer electron QA metrics, enabling finer reconstruction quality analysis across DCAxy, DCAz, TPC clusters, and ITS clusters. This lays groundwork for targeted performance tuning and more reliable physics analyses.
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025: Delivered feature enhancement in AliceO2Group/O2Physics that expands Z->ee QA histograms with configurable minimum Z mass and richer electron QA metrics, enabling finer reconstruction quality analysis across DCAxy, DCAz, TPC clusters, and ITS clusters. This lays groundwork for targeted performance tuning and more reliable physics analyses.
August 2025
3 Commits • 2 Features
Aug 1, 2025August 2025 performance highlights for AliceO2Group/O2Physics: - Key features delivered: - Z->ee Analysis Enhancements and QA: enhanced Z boson analysis in the electron channel by adding eta and dE/dx axes to electron histograms, implemented a momentum correction for decay electrons, added QA histograms, and updated centrality binning for Z->ee reconstruction. - Z-hadron Analysis Centrality and pT Ratio: introduced centrality selection and pT ratio calculations for Z-hadron analysis, with new centrality configurations and histograms to study Z-hadron correlations as a function of collision centrality. - Major bugs fixed: - No critical bugs fixed this month; QA improvements and refined centrality binning reduce risk and improve reliability going forward. - Overall impact and accomplishments: - Strengthened the precision and reliability of Z boson electroweak analyses and centrality-dependent Z-hadron studies, enabling more differential physics insights and robust validation across Run-3-like conditions. - Technologies/skills demonstrated: - ROOT-based histogram manipulation, momentum corrections, QA instrumentation, centrality handling, and cross-branch collaboration with PWGHF components. Repository: AliceO2Group/O2Physics Month: 2025-08
3 Commits • 2 Features
Aug 1, 2025August 2025 performance highlights for AliceO2Group/O2Physics: - Key features delivered: - Z->ee Analysis Enhancements and QA: enhanced Z boson analysis in the electron channel by adding eta and dE/dx axes to electron histograms, implemented a momentum correction for decay electrons, added QA histograms, and updated centrality binning for Z->ee reconstruction. - Z-hadron Analysis Centrality and pT Ratio: introduced centrality selection and pT ratio calculations for Z-hadron analysis, with new centrality configurations and histograms to study Z-hadron correlations as a function of collision centrality. - Major bugs fixed: - No critical bugs fixed this month; QA improvements and refined centrality binning reduce risk and improve reliability going forward. - Overall impact and accomplishments: - Strengthened the precision and reliability of Z boson electroweak analyses and centrality-dependent Z-hadron studies, enabling more differential physics insights and robust validation across Run-3-like conditions. - Technologies/skills demonstrated: - ROOT-based histogram manipulation, momentum corrections, QA instrumentation, centrality handling, and cross-branch collaboration with PWGHF components. Repository: AliceO2Group/O2Physics Month: 2025-08
August 2025
July 2025
2 Commits • 1 Features
Jul 1, 20252025-07: Delivered Z boson–Z-hadron correlation capabilities in PWGHF within O2Physics. Implemented configurable Z mass windows, associated hadron properties, and histograms for Z pT spectra and Z-hadron delta phi. Refactored Z boson reconstruction to include associated track properties and delta phi computation with tracks. Added charge information to histograms and introduced a charge axis to improve precision for Z pT and Z-hadron correlations. This strengthens the ability to study Z+hadron dynamics and provides tighter constraints for QCD models and experimental comparisons.
July 2025
2 Commits • 1 Features
Jul 1, 20252025-07: Delivered Z boson–Z-hadron correlation capabilities in PWGHF within O2Physics. Implemented configurable Z mass windows, associated hadron properties, and histograms for Z pT spectra and Z-hadron delta phi. Refactored Z boson reconstruction to include associated track properties and delta phi computation with tracks. Added charge information to histograms and introduced a charge axis to improve precision for Z pT and Z-hadron correlations. This strengthens the ability to study Z+hadron dynamics and provides tighter constraints for QCD models and experimental comparisons.
June 2025
4 Commits • 2 Features
Jun 1, 2025June 2025 highlights for AliceO2Group/O2Physics: Delivered feature enhancements to PWGHF Weak Boson Analysis and PWGHF Electron/EMCal Weak Boson Selection, integrating KFParticle-based mass reconstruction, refining histogram schemas, and extending EMCal diagnostics. These changes improve measurement precision, analysis robustness, and build reliability. No explicit major bug fixes were reported this month; focus was on feature delivery and workflow improvements.
4 Commits • 2 Features
Jun 1, 2025June 2025 highlights for AliceO2Group/O2Physics: Delivered feature enhancements to PWGHF Weak Boson Analysis and PWGHF Electron/EMCal Weak Boson Selection, integrating KFParticle-based mass reconstruction, refining histogram schemas, and extending EMCal diagnostics. These changes improve measurement precision, analysis robustness, and build reliability. No explicit major bug fixes were reported this month; focus was on feature delivery and workflow improvements.
June 2025
May 2025
2 Commits • 2 Features
May 1, 2025Concise monthly summary for 2025-05 focusing on key achievements in AliceO2Group/O2Physics for PWGHF/HFL development. Emphasizes delivered features, impact on data analysis quality, and technical proficiency demonstrated.
May 2025
2 Commits • 2 Features
May 1, 2025Concise monthly summary for 2025-05 focusing on key achievements in AliceO2Group/O2Physics for PWGHF/HFL development. Emphasizes delivered features, impact on data analysis quality, and technical proficiency demonstrated.
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 focused on delivering a Zee-centered Z boson invariant mass analysis in O2Physics, with improvements to selection, configurability, and data products to support targeted Zee studies and faster iteration.
2 Commits • 1 Features
Mar 1, 2025March 2025 focused on delivering a Zee-centered Z boson invariant mass analysis in O2Physics, with improvements to selection, configurability, and data products to support targeted Zee studies and faster iteration.
March 2025
January 2025
1 Commits • 1 Features
Jan 1, 2025January 2025: Delivered Electron Candidate Isolation Criteria for W/Z Analysis in the O2Physics workflow, introducing configurable isolation cuts to improve electron candidate purity. Implemented track-based isolation and configurable E/p cuts to filter electrons, reducing background in W/Z selections. The changes are implemented in PWGHF/HFL and linked to commit a92037dbff27747a280cedbb85b8b533e57e9878, enabling reproducible, tunable analysis cuts for future studies.
January 2025
1 Commits • 1 Features
Jan 1, 2025January 2025: Delivered Electron Candidate Isolation Criteria for W/Z Analysis in the O2Physics workflow, introducing configurable isolation cuts to improve electron candidate purity. Implemented track-based isolation and configurable E/p cuts to filter electrons, reducing background in W/Z selections. The changes are implemented in PWGHF/HFL and linked to commit a92037dbff27747a280cedbb85b8b533e57e9878, enabling reproducible, tunable analysis cuts for future studies.
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024: Delivered a configurable electron isolation cut in O2Physics to enhance electron identification purity. The changes add adjustable isolation cone radius and maximum isolation energy, plus a new isIsolatedCluster function, implemented in taskElectronWeakBoson.cxx. This directly reduces background energy deposits, improving signal purity for downstream analyses. No major bug fixes this month; focused on feature delivery and code quality. Technologies demonstrated include C++, modular function design, and maintainable parameter-driven configuration.
1 Commits • 1 Features
Dec 1, 2024December 2024: Delivered a configurable electron isolation cut in O2Physics to enhance electron identification purity. The changes add adjustable isolation cone radius and maximum isolation energy, plus a new isIsolatedCluster function, implemented in taskElectronWeakBoson.cxx. This directly reduces background energy deposits, improving signal purity for downstream analyses. No major bug fixes this month; focused on feature delivery and code quality. Technologies demonstrated include C++, modular function design, and maintainable parameter-driven configuration.
December 2024
November 2024
1 Commits
Nov 1, 2024November 2024 monthly summary for AliceO2Group/O2Physics focusing on EMCal electron matching correctness bug fix and its business value and technical impact.
November 2024
1 Commits
Nov 1, 2024November 2024 monthly summary for AliceO2Group/O2Physics focusing on EMCal electron matching correctness bug fix and its business value and technical impact.
Activity
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Quality Metrics
Correctness81.6%
Maintainability80.0%
Architecture77.8%
Performance62.2%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++
Technical Skills
C++C++ DevelopmentCMakeConfiguration ManagementData AnalysisData ProcessingEvent FilteringHigh Energy PhysicsParticle PhysicsParticle Physics AnalysisPhysics AnalysisSoftware ConfigurationSoftware DevelopmentSoftware EngineeringTrigger Selection
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