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Sitian Qian

Particle physics · machine learning · scientific computing

I am an experimental particle physicist at Northwestern University and Fermilab, and a convener of CMS Offline Samples. I develop physics-aware machine-learning methods, collider analyses, and reproducible tools for turning complex detector data into useful measurements.

Research portfolio · Google Scholar · CERN · Email

Finding structure in collisions—and in the data they leave behind.

Research

  • Collider measurements — analysis strategies for rare or structurally rich signatures, with interpretable observables and robust uncertainty treatment.
  • Physics-aware machine learning — models that incorporate symmetry, geometry, and particle-interaction structure.
  • Research infrastructure — reproducible generation, simulation, and analysis workflows that scale from notebooks to distributed computing.

Selected work

Project Area Links
CaloTrilogy Physics-guided, end-to-end calorimeter shower generation Preprint
Particle Transformer Particle-interaction-aware attention for jet tagging Paper · Code
State-space models for collider events Efficient modeling of long, sparse particle sequences Paper
Quantum models, made practical Quantum kernels and knowledge distillation for collider physics QNN study · CEPC application

Open research tools

  • higgs-combine-tool — an experimental route to a pip-installable CMS Combine v11.
  • jetutor — matched JetClass editions for stress-testing taggers against generator choices.
  • nano.rust — a semantics-first, pure-Rust framework for CMS NanoAOD analysis.
  • DELPHI simulation pipeline — a bridge from modern HepMC3 generators to DELPHI simulation and reconstruction.

Explore the fuller research record, CMS analyses, appointments, and project notes at dickychant.github.io.

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