February 2026 — AliceO2Group/O2Physics: Delivered GammaJetTreeProducer Substructure Data Model Enhancement to improve handling of jet substructure tables for charged jets. This data-model upgrade enhances data integrity and accelerates downstream analyses. Commit eb2e639c132ea6e8c00466f52f6f219d1742ea93 ([PWGJE] gammaJetTreeProducer updated substructure tables (#14700)). No major bugs fixed this month in this area. Impact: more reliable substructure analysis and smoother pipelines. Technologies: C++, ROOT-based data modeling, Git workflow, O2Physics pipeline integration.

January 2026 monthly summary focusing on delivered features and bug fixes across AliceO2Group repositories. Highlights include critical bug fix for beam collision data retrieval, enhancements to jet analysis with substructure information, and improved event selection and cluster analysis in EMCAL.

July 2025 focused on correctness and stability of GammaJetTrees decay chain processing in O2Physics. Delivered a targeted bug fix to ensure full decay chain reconstruction, with improved recursion handling, correct pass-by-reference semantics for the daughters vector, and safeguards to limit recursion depth. No new features released this month; primary value came from reliability and downstream analysis trust.

June 2025 monthly summary for AliceO2Group/O2Physics: Delivered GammaJetTree MC Capabilities Integration and Performance Enhancements, enabling richer Monte Carlo information for clusters and jets, with processing optimizations and new QA histograms. This work improves simulation fidelity and accelerates MC-enabled analysis, strengthening validation and decision-making processes.

May 2025 – AliceO2Group/O2Physics: Delivered performance and data-quality improvements through a memory-optimized QA mode and a targeted EMCal time calibration fix. Demonstrated capabilities in flag-driven histogram control, run-range calibration adjustments, and commits with clear PWGJE traceability. These changes reduce memory footprint, enhance QA throughput, and improve time measurements for low-gain cells.

Summary for 2025-04: No new features delivered; one bug fix that improves data integrity for PWGJE analyses. Key bug fix: corrected IsoRaw data type in GammaJetAnalysisTree header from ushort to float to properly represent isolation energy values, enabling correct data handling in PWGJE analysis.

January 2025 – AliceO2Group/O2Physics: Delivered a targeted EMCal-based event selection capability for charged jets, enabling granular control over event filtering in charged jet analyses. Updated the jetFinder.cxx path to integrate the new configuration flag and wired it into the event processing flow, improving analysis precision and reproducibility. Commit reference: e871d9511858c3983f03d5c5466f38be447cfb5f (PWGJE) #9563.

November 2024 – AliceO2Group/O2Physics: GammaJetTrees enhancements and Gamma-Jet cluster/trigger improvements. Delivered data-structure expansions, QA histograms, and refined track matching for improved analysis fidelity; introduced a new cluster definition option and energy-based event acceptance gating to strengthen data filtering and trigger capabilities. These changes enhance the precision of gamma-jet correlations, improve offline QA, and enable more scalable processing for large datasets.