Research

ALICE Run 3 charged-particle jets

I am the main analyzer of the first ALICE Run 3 inclusive charged-particle jet cross-section measurement (in preparation, target 2026): R-dependent charged-particle jet production in pp at √s = 13.6 TeV with ALICE. The analysis spans the full chain — detector-level QA on continuous-readout data, jet reconstruction in O²Physics, response-matrix building, Bayesian / SVD unfolding, and a complete systematic-uncertainty programme covering tracking effects and unfolding stability. Preliminary results are PWG-JE-approved; presented on behalf of ALICE at EPS-HEP 2025 (PWG-JE merge talk).

The physics motivation behind varying the jet radius R from 0.2 to 0.6: probing the balance between collinear (small-R) and large-angle/non-perturbative (large-R) emissions at p_T in a regime where MC tunes disagree, and providing the pp baseline for forthcoming O–O / Ne–Ne running where energy-loss searches in small systems become accessible.

I established the Run 3-specific cross-section normalization based on the TVX visible cross section under continuous readout, and wrote jetCrossSectionEfficiency.cxx (the O²Physics task used for normalization by the SKKU Run 3 charged-jet analyses, pp 13.6 TeV and O–O).

Tracking-efficiency systematics for Hard Probes 2026

I contributed the pp √s = 13.6 TeV total charged-particle tracking-efficiency systematic (~1.5% across the dominant p_T range; p_T-binned) for the PWG-JE Hard Probes 2026 preparation, including extension to the 2022, 2023, and 2024 periods. My ITS-TPC matching code was reused by a PWG-JE colleague as a starting point for PbPb tracking studies.

Related Run 3 understanding: trigger-level inefficiencies introduced by the continuous-readout TPC and asynchronous reconstruction; track-p_T resolution studies (covariance-matrix propagation, MC residuals, V0 mass resolution) feeding a p_T-dependent TrackTuner smearing used for charged-jet systematic studies in Run 3.

ePIC Barrel Imaging Calorimeter (BIC)

I work across two 2025 test-beam campaigns of the Pb/scintillating-fiber prototype: KEK AF–AR (2025.03; on-site DAQ shifter, equalization, prompt analysis; co-author on the KEK paper in preparation) and CERN PS T10 (2025.07; lead offline analyst; paper in preparation, 2026, covering energy response, resolution, and linearity). I am a co-author on the first beam-test paper, with module-construction support and PMT/module performance characterization roles (submitted to Nucl. Instrum. Meth. A, NIMA-D-26-00482; arXiv preprint posted; companion JKPS submission).

Earlier hardware work: PMT–module QA prior to the test beams — signal characterization with cosmic-ray and radioactive-source data, timing-coincidence checks, optical-coupling stability, applied per-module acceptance criteria. On the simulation/reconstruction side I contribute energy- and η-dependent sampling-fraction studies in JANA2 / EIC-recon and Geant4 prototype modeling for the Korea-BIC software effort.

ALICE O²Physics framework

I have contributed 37 pull requests (18 merged) to AliceO2Group/O2Physics since 2023, covering jet finding, response matrices, systematic-uncertainty pipelines, hadronic-rate fixes, and central reconstruction.

• Central-framework patch in Common/Tools (PR #15174, merged): fixed stale Q/p_T values in the graph-based TrackTuner momentum-smearing path.
• Author of jetCrossSectionEfficiency.cxx (PR #14057, merged): the PWG-JE task used by the SKKU Run 3 charged-jet analyses (pp 13.6 TeV; O–O) for cross-section normalization at particle level.
• Code review on community pull requests across PWG-JE and Common.

What I am thinking about

• Jet production and non-perturbative QCD: observables sensitive to hadronization and soft physics.
• Groomed jet substructure (Soft Drop z_g, primary Lund-plane density) in high-multiplicity pp and the forthcoming O–O / Ne–Ne running — as a search for energy-loss signatures in small systems.
• Initial-state effects and CGC-inspired frameworks for interpreting small-system jet measurements.
• Detector R&D and performance characterization through test-beam data and simulation.

Selected publications →   Recent talks →   CV (PDF) →