AliceO2Group/O2Physics
Nov 2024 – Mar 2026
16 Months active
Languages Used
C++
Technical Skills
C++ DevelopmentData AnalysisMonte Carlo SimulationParticle PhysicsBuild SystemsC++
nkaratze
PROFILE
Nkaratze
Nicholas Karatzenis developed and refined advanced V0 particle analysis workflows in the AliceO2Group/O2Physics repository, focusing on configurable selection criteria, robust histogram management, and improved event reconstruction for K0s, Lambda, and AntiLambda studies. Leveraging C++ and ROOT, Nicholas implemented modular data analysis pipelines with configurable Monte Carlo matching, centrality-driven 2D histograms, and dynamic event selection, enhancing both analysis precision and reproducibility. His work addressed data integrity and maintainability through code refactoring, bug fixes, and standardized configuration naming. These contributions enabled more accurate physics measurements, streamlined onboarding, and established a reliable foundation for ongoing high energy physics software development.
Overall Statistics
Feature vs Bugs
79%Features
Repository Contributions
28Total
Bugs
4
Commits
28
Features
15
Lines of code
6,513
Activity Months16
Your Network
139 peopleShared Repositories
139
Work History
March 2026
1 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for O2Physics development: Focused feature work on V0PtInvMassPlots configuration naming and clarity enhancements, with an emphasis on consistent handling of AntiLambda and K0s configurations to improve maintainability and reliability of V0 analysis tasks.
1 Commits • 1 Features
Mar 1, 2026March 2026 monthly summary for O2Physics development: Focused feature work on V0PtInvMassPlots configuration naming and clarity enhancements, with an emphasis on consistent handling of AntiLambda and K0s configurations to improve maintainability and reliability of V0 analysis tasks.
March 2026
February 2026
5 Commits • 1 Features
Feb 1, 2026February 2026 summary for AliceO2Group/O2Physics: Delivered targeted data-analysis reliability improvements and maintainability enhancements that directly boost result quality and reproducibility. Completed a cross-module bug fix to ensure accurate centrality calibration and event selection across MC processing paths (V0PtInvMassPlots, RecoMC, genMCProcess), addressing biases in downstream analyses and aligning with established standards. Implemented histogram registry naming standardization and parameter conventions for V0PtInvMassPlots in K0s and antiLambda analyses, enabling consistent reporting and easier onboarding. Included supportive changes (minor table subscription tweak and re-enabling Event Selection) to stabilize the calibration workflow. These changes reduce rework, improve data integrity, and strengthen the foundation for physics analyses.
February 2026
5 Commits • 1 Features
Feb 1, 2026February 2026 summary for AliceO2Group/O2Physics: Delivered targeted data-analysis reliability improvements and maintainability enhancements that directly boost result quality and reproducibility. Completed a cross-module bug fix to ensure accurate centrality calibration and event selection across MC processing paths (V0PtInvMassPlots, RecoMC, genMCProcess), addressing biases in downstream analyses and aligning with established standards. Implemented histogram registry naming standardization and parameter conventions for V0PtInvMassPlots in K0s and antiLambda analyses, enabling consistent reporting and easier onboarding. Included supportive changes (minor table subscription tweak and re-enabling Event Selection) to stabilize the calibration workflow. These changes reduce rework, improve data integrity, and strengthen the foundation for physics analyses.
January 2026
2 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary for AliceO2Group/O2Physics: Delivered V0 Particle Analysis Enhancements with derived processes for K0s, Lambda, and Anti-Lambda, featuring improved event selection and histogram filling; corrected axis handling in V0PtInvMassPlots for more accurate 2D histogram representations. These changes strengthen V0 reconstruction, improve measurement precision, and enhance reproducibility for physics analyses. Commits underpinning this work include: [PWGLF] Added Derived Processes and Corrections (#14576) with hash f174488895ca7e60a07ae47addbaffe552455253 and [PWGLF] Correction to 2D Histograms (#14718) with hash 695559c7b2e535bbf14fc36612b4875d706edd37.
2 Commits • 1 Features
Jan 1, 2026January 2026 monthly summary for AliceO2Group/O2Physics: Delivered V0 Particle Analysis Enhancements with derived processes for K0s, Lambda, and Anti-Lambda, featuring improved event selection and histogram filling; corrected axis handling in V0PtInvMassPlots for more accurate 2D histogram representations. These changes strengthen V0 reconstruction, improve measurement precision, and enhance reproducibility for physics analyses. Commits underpinning this work include: [PWGLF] Added Derived Processes and Corrections (#14576) with hash f174488895ca7e60a07ae47addbaffe552455253 and [PWGLF] Correction to 2D Histograms (#14718) with hash 695559c7b2e535bbf14fc36612b4875d706edd37.
January 2026
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025: Delivered centrality-driven 2D histogram enhancements in AliceO2Group/O2Physics, introducing centrality measures into event histograms and enabling two-dimensional histogram data. This improves event reconstruction accuracy for V0 particle analyses and strengthens the repository's data-analysis capabilities for heavy-ion studies. The work demonstrates effective cross-module integration and provides tangible business value through more precise physics results and faster analysis iterations.
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025: Delivered centrality-driven 2D histogram enhancements in AliceO2Group/O2Physics, introducing centrality measures into event histograms and enabling two-dimensional histogram data. This improves event reconstruction accuracy for V0 particle analyses and strengthens the repository's data-analysis capabilities for heavy-ion studies. The work demonstrates effective cross-module integration and provides tangible business value through more precise physics results and faster analysis iterations.
November 2025
4 Commits • 1 Features
Nov 1, 2025Month: 2025-11 — Delivered targeted improvements to O2Physics V0 analysis and data access, focusing on robust histograms, maintainability, and data accessibility. Achieved measurable improvements in analysis fidelity and maintainability, with code cleanups and a bug fix impacting data access.
4 Commits • 1 Features
Nov 1, 2025Month: 2025-11 — Delivered targeted improvements to O2Physics V0 analysis and data access, focusing on robust histograms, maintainability, and data accessibility. Achieved measurable improvements in analysis fidelity and maintainability, with code cleanups and a bug fix impacting data access.
November 2025
October 2025
2 Commits • 1 Features
Oct 1, 2025Oct 2025 monthly summary focusing on key accomplishments for AliceO2Group/O2Physics. Delivered critical histogram infrastructure enhancements enabling signal splitting analysis for Kaon/Lambda/Antilambda particles, fixed data integrity issues in histogram naming, and strengthened overall analysis reliability.
October 2025
2 Commits • 1 Features
Oct 1, 2025Oct 2025 monthly summary focusing on key accomplishments for AliceO2Group/O2Physics. Delivered critical histogram infrastructure enhancements enabling signal splitting analysis for Kaon/Lambda/Antilambda particles, fixed data integrity issues in histogram naming, and strengthened overall analysis reliability.
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025 summary for AliceO2Group/O2Physics: Delivered configurable Monte Carlo (MC) matching controls for K0s, Lambda, and Antilambda in PWGLF analysis. This included adding new switches, refactoring the selection logic to apply cuts correctly, and enabling debugging capabilities to improve precision and validation of PWGLF particle selection. No major bugs fixed this month; focus remained on feature delivery, code quality, and enabling more flexible MC studies for reliable performance assessments.
1 Commits • 1 Features
Sep 1, 2025September 2025 summary for AliceO2Group/O2Physics: Delivered configurable Monte Carlo (MC) matching controls for K0s, Lambda, and Antilambda in PWGLF analysis. This included adding new switches, refactoring the selection logic to apply cuts correctly, and enabling debugging capabilities to improve precision and validation of PWGLF particle selection. No major bugs fixed this month; focus remained on feature delivery, code quality, and enabling more flexible MC studies for reliable performance assessments.
September 2025
August 2025
2 Commits
Aug 1, 2025August 2025 monthly summary for AliceO2Group/O2Physics: Focused on V0 analysis bug fixes and PWGLF plotting corrections that improve data quality, reproducibility, and downstream physics results. Implemented targeted fixes to analysis logic, histogram binning, and event selection; ensured valid V0 candidates in Armenteros-Podolanski plots; strengthened PWGLF plotting reliability.
August 2025
2 Commits
Aug 1, 2025August 2025 monthly summary for AliceO2Group/O2Physics: Focused on V0 analysis bug fixes and PWGLF plotting corrections that improve data quality, reproducibility, and downstream physics results. Implemented targeted fixes to analysis logic, histogram binning, and event selection; ensured valid V0 candidates in Armenteros-Podolanski plots; strengthened PWGLF plotting reliability.
July 2025
1 Commits • 1 Features
Jul 1, 2025July 2025 performance summary for AliceO2Group/O2Physics: Delivered a configurable V0 selection framework in PWGLF with refactored structures and histograms for K0s/Lambda/Antilambda; added event/signal correction utilities to support reproducible physics analyses. No major bugs fixed this month; focus on feature delivery and refactoring to improve robustness. Impact: enables finer control over V0 selection, improved analysis accuracy, and faster iteration for physics analyses. Technologies: C++, PWGLF module, histogram tooling, data-structure refactoring, configuration-driven design.
1 Commits • 1 Features
Jul 1, 2025July 2025 performance summary for AliceO2Group/O2Physics: Delivered a configurable V0 selection framework in PWGLF with refactored structures and histograms for K0s/Lambda/Antilambda; added event/signal correction utilities to support reproducible physics analyses. No major bugs fixed this month; focus on feature delivery and refactoring to improve robustness. Impact: enables finer control over V0 selection, improved analysis accuracy, and faster iteration for physics analyses. Technologies: C++, PWGLF module, histogram tooling, data-structure refactoring, configuration-driven design.
July 2025
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for the O2Physics repository, focusing on feature delivery and impact from PWGLF work. The primary effort was refining V0 invariant mass plots by tightening the event selection and applying more precise MC corrections, with updates to histogramming for MC and data. No separate bug fixes are recorded this month for this repo; the work centers on feature improvements and data/MC consistency.
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for the O2Physics repository, focusing on feature delivery and impact from PWGLF work. The primary effort was refining V0 invariant mass plots by tightening the event selection and applying more precise MC corrections, with updates to histogramming for MC and data. No separate bug fixes are recorded this month for this repo; the work centers on feature improvements and data/MC consistency.
April 2025
2 Commits • 1 Features
Apr 1, 2025April 2025 (2025-04) performance summary for AliceO2Group/O2Physics. Key delivery centered on V0 particle analysis enhancements to improve tracking and physics analyses in simulation. Implemented PDG-based particle identification, expanded histograms (vertex Z-position, daughter particle pt, generated and V0 rapidity), and MC loop enhancements to fill rapidity histograms, with an isPhysicalPrimary check to ensure clean histograms. No major bugs documented for this repository in April 2025. This work strengthens analysis reliability for V0 particles (K0s, Lambda, AntiLambda) and enables more robust MC-to-data comparisons. Demonstrates proficiency in C++/ROOT-based analysis tooling, histogram instrumentation, PDG-based ID, and code quality controls.
2 Commits • 1 Features
Apr 1, 2025April 2025 (2025-04) performance summary for AliceO2Group/O2Physics. Key delivery centered on V0 particle analysis enhancements to improve tracking and physics analyses in simulation. Implemented PDG-based particle identification, expanded histograms (vertex Z-position, daughter particle pt, generated and V0 rapidity), and MC loop enhancements to fill rapidity histograms, with an isPhysicalPrimary check to ensure clean histograms. No major bugs documented for this repository in April 2025. This work strengthens analysis reliability for V0 particles (K0s, Lambda, AntiLambda) and enables more robust MC-to-data comparisons. Demonstrates proficiency in C++/ROOT-based analysis tooling, histogram instrumentation, PDG-based ID, and code quality controls.
April 2025
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025: Implemented V0 Particle Production Analysis Enhancements in O2Physics, enabling deeper MC studies of V0 production and improved analysis accuracy.
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025: Implemented V0 Particle Production Analysis Enhancements in O2Physics, enabling deeper MC studies of V0 production and improved analysis accuracy.
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025 — O2Physics: Delivered enhanced V0 particle selection and analysis for V0 mass plots. Implemented additional selection cuts for V0 species (K0Short, Lambda, AntiLambda) and introduced configurable parameters for vertex Z, daughter eta, and PID cuts, plus histograms for detailed analysis. This work directly improves V0 identification precision, reduces systematic uncertainties in V0 mass measurements, and enhances signal-to-background separation, enabling more accurate physics results and stronger constraints on strange-baryon production. The changes are tracked under commit c6805aba6c5ca8a3c47e6e34f611ae1698de1c34 for PWGLF's v0ptinvmassplots task (#9667).
1 Commits • 1 Features
Feb 1, 2025February 2025 — O2Physics: Delivered enhanced V0 particle selection and analysis for V0 mass plots. Implemented additional selection cuts for V0 species (K0Short, Lambda, AntiLambda) and introduced configurable parameters for vertex Z, daughter eta, and PID cuts, plus histograms for detailed analysis. This work directly improves V0 identification precision, reduces systematic uncertainties in V0 mass measurements, and enhances signal-to-background separation, enabling more accurate physics results and stronger constraints on strange-baryon production. The changes are tracked under commit c6805aba6c5ca8a3c47e6e34f611ae1698de1c34 for PWGLF's v0ptinvmassplots task (#9667).
February 2025
January 2025
1 Commits • 1 Features
Jan 1, 2025January 2025: Implemented configurable topological cuts for V0 particle analysis (K0s, Lambda, Anti-Lambda) in PWGLF, enabling refined selection via vertex Z, nSigma, mass, and eta. Injected into both MC and real data processing to improve reconstruction accuracy and analysis quality, supporting more reliable physics signals and streamlined analysis workflows in O2Physics.
January 2025
1 Commits • 1 Features
Jan 1, 2025January 2025: Implemented configurable topological cuts for V0 particle analysis (K0s, Lambda, Anti-Lambda) in PWGLF, enabling refined selection via vertex Z, nSigma, mass, and eta. Injected into both MC and real data processing to improve reconstruction accuracy and analysis quality, supporting more reliable physics signals and streamlined analysis workflows in O2Physics.
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for AliceO2Group/O2Physics: Focused on code quality improvements to strengthen CI gates and maintainability. Implemented Megalinter compliance for v0ptinvmassplots.cxx by adding headers for memory management, vectors, and strings, aligning code with Megalinter rules. This change is captured in commit 6f13dcee7aee84404653fe990cfe8e73dd1824d8 and linked to task (#8305). No major user-facing features or bugs fixed this month; the work improves reliability, maintainability, and future development velocity by reducing risk of CI failures and enabling safer enhancements.
1 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for AliceO2Group/O2Physics: Focused on code quality improvements to strengthen CI gates and maintainability. Implemented Megalinter compliance for v0ptinvmassplots.cxx by adding headers for memory management, vectors, and strings, aligning code with Megalinter rules. This change is captured in commit 6f13dcee7aee84404653fe990cfe8e73dd1824d8 and linked to task (#8305). No major user-facing features or bugs fixed this month; the work improves reliability, maintainability, and future development velocity by reducing risk of CI failures and enabling safer enhancements.
December 2024
November 2024
1 Commits • 1 Features
Nov 1, 2024November 2024 (2024-11) — AliceO2Group/O2Physics: This month delivered a robust feature set for more accurate and configurable physics analysis, with a focus on improving data quality and reproducibility. Key features delivered: Configurable bins and ranges for the generated pT spectrum plots, and refined Monte Carlo data processing with checks for physical primary particles and a rapidity window; enhances reconstruction by considering only physical primary particles for V0 analysis and applying more specific filtering for K0s, Lambda, and AntiLambda candidates. Overall impact: More precise, tunable analysis plots and more trustworthy V0 results, improving the fidelity of physics conclusions and streamlining analyst workflows. Technologies/skills demonstrated: C++/Python data processing, Monte Carlo validation, rigorous filtering logic, and configurable plotting pipelines; strong version control and traceability. Commit reference included.
November 2024
1 Commits • 1 Features
Nov 1, 2024November 2024 (2024-11) — AliceO2Group/O2Physics: This month delivered a robust feature set for more accurate and configurable physics analysis, with a focus on improving data quality and reproducibility. Key features delivered: Configurable bins and ranges for the generated pT spectrum plots, and refined Monte Carlo data processing with checks for physical primary particles and a rapidity window; enhances reconstruction by considering only physical primary particles for V0 analysis and applying more specific filtering for K0s, Lambda, and AntiLambda candidates. Overall impact: More precise, tunable analysis plots and more trustworthy V0 results, improving the fidelity of physics conclusions and streamlining analyst workflows. Technologies/skills demonstrated: C++/Python data processing, Monte Carlo validation, rigorous filtering logic, and configurable plotting pipelines; strong version control and traceability. Commit reference included.
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Quality Metrics
Correctness88.6%
Maintainability82.8%
Architecture82.6%
Performance79.0%
AI Usage21.4%
Skills & Technologies
Programming Languages
C++
Technical Skills
Build SystemsC++C++ DevelopmentC++ developmentC++ programmingCode QualityConfiguration ManagementData AnalysisHigh Energy PhysicsMonte Carlo SimulationParticle PhysicsPhysics AnalysisROOTSoftware DevelopmentSoftware Engineering
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