cms-sw/cmssw

Health v2 · maintenance only

Adoption not part of the score

1328 stars · 4709 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

CMSSW is the offline software framework of the CMS experiment at CERN's Large Hadron Collider, written primarily in C++ with Python configuration. It handles event reconstruction, simulation, data processing, and physics analysis of particle collision data.

Use cases

• reconstruct particle collision events from LHC detector data
• simulate proton-proton collisions for physics analysis
• run CMS data processing workflows on the grid
• analyze Higgs boson or standard model physics data
• build and test CMS software releases
• process detector data into physics object formats

When to choose

• you are a CMS collaboration member analyzing or processing LHC collision data
• you need the official event reconstruction or simulation chain for the CMS detector
• you are developing or validating physics algorithms against CMS data formats

When to avoid

• you need general-purpose particle physics simulation outside the CMS experiment
• you want a lightweight analysis tool without the CMS software ecosystem
• you are not working with CMS data formats or computing infrastructure

Facets

framework · maturity active

simulation data-science workflow-automation developer-tools data-science simulation developer-tools cpp python high-energy-physics cern particle-physics lhc cms-experiment detector-reconstruction event-processing scientific-computing physics linux macos gpu

Member repositories

For agents

markdown · JSON · MCP: product_card(name="cms-sw/cmssw")