
Marvin Hemmer contributed to the AliceO2Group/AliceO2 repository by expanding the physics constants set and improving detector reconstruction algorithms. He added eta, omega, and eta' meson constants to PhysicsConstants.h, using Python scripts to automate data generation and ensure maintainable, source-of-truth updates. In C++, Marvin addressed a core bug in the EMCAL Clusterizer, modifying the algorithm to include neighboring cells when the energy gradient cut is disabled, which improved cluster formation accuracy and downstream energy measurements. His work demonstrated depth in algorithm development, constants management, and particle physics, with well-documented, isolated changes that enhanced simulation reliability and maintainability.

September 2025: Expanded physics constants coverage in AliceO2 by adding eta, omega, and eta' meson constants with updated PDG codes and masses. Implemented script-driven data generation to populate PhysicsConstants.h and ensured automated header updates. This work broadens simulation capabilities, improves result accuracy, and sets the stage for maintainable future updates.
September 2025: Expanded physics constants coverage in AliceO2 by adding eta, omega, and eta' meson constants with updated PDG codes and masses. Implemented script-driven data generation to populate PhysicsConstants.h and ensured automated header updates. This work broadens simulation capabilities, improves result accuracy, and sets the stage for maintainable future updates.
October 2024 (AliceO2Group/AliceO2): Delivered a critical bug fix to the EMCAL Clusterizer to include neighboring cells when the energy gradient cut is disabled, addressing a bug where only the seed cell was considered. This change improves cluster formation accuracy and energy reconstruction, with downstream benefits for physics analyses.
October 2024 (AliceO2Group/AliceO2): Delivered a critical bug fix to the EMCAL Clusterizer to include neighboring cells when the energy gradient cut is disabled, addressing a bug where only the seed cell was considered. This change improves cluster formation accuracy and energy reconstruction, with downstream benefits for physics analyses.
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